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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Activation Energy for Solder Bond Degradation: Thermal Cycling of Field-aged Modules at Multiple Upper Temperatures

The reliability of solder joints in the solar cell metallization-interconnect system influences the lifetime of photovoltaic modules. Two field-aged modules-one with Sn 62 Pb 36 Ag 2 solder at the solder joints (Solarex MSX 60), and the other with the standard Sn 60 Pb 40 solder (Siemens M55)-were subjected to a modified thermal cycling (TC) test of IEC 61215. Three sections in each module were maintained at 85 degrees C, 95 degrees C, and 105 degrees C during the 15-minute high temperature dwell time. Current equivalent to the module short-circuit current was injected through the module when the chamber temperature was above 25 degrees C to simulate regular field operation. This novel approach aims to induce thermomechanical fatigue (TMF) at the solder joints and intermetallic compound (IMC) formation at the metal/solder interfaces. The activation energy (E a ) for solder bond degradation was calculated based on the series resistance (R s ) increase in TC testing rather than power drop to avoid the effect of confounding variables. Module-level R s increase in MSX 60 module after TC800 cycles and in M55 module after TC400 cycles was 1.22% and 183.7%, respectively. The E a determined for the module with 2wt% Ag is 0.24 eV and for that with the standard solder is 0.27 eV. The solder bond degradation seems to have been driven by TMF rather than IMC formation for both modules.

14 SOLAR ENERGY↗
DOE OSTI2025

Data for Soil Fertility Management for Sustainable Miscanthus × giganteus Production: Increased Tiller Weight from Nitrogen Management Explains Yield Gains in Aged Miscanthus

Aging-related yield decline in Miscanthus × giganteus (miscanthus) remains a major constraint to sustainable biomass production. This study evaluated how nitrogen (N) management and soil fertility influence yield-component traits and productivity in aging miscanthus. Trials were conducted at two sites established in 2008 at the University of Illinois Energy Farm, Urbana, IL. (i) The Sun Grant trial received 0, 60, and 120 kg N ha−1 annually until 2015. Starting 2021, half of each plot received 60 or 120 kg N ha−1, resulting in six legacy-contemporary treatments: 0N–0N, 0N–120N, 60N–0N, 60N–60N, 120N–0N, 120N–120N. (ii) The Energy Farm trial remained unfertilized until 2014, when one half of each plot received 56 kg N ha−1, forming two treatments: 0N–0N, 0N–56N. Sun Grant trial results showed N fertilization increased tiller density (tillers m−2) and tiller weight (g tiller−1) in juvenile to early-mature miscanthus (2011–2015). After N withdrawal, both traits declined (20 % and 40 %), though legacy effects persisted in tiller weight in the aging stands (2020–2023). Contemporary N had little effect on tiller density but increased tiller weight by 34 %–77 %, resulting in 23 %–106 % higher machine-harvested biomass yield in 0–120N, 60-60N, and 120-120N plots. At the Energy Farm trial, 0N–56N plots yielded 59 %–108 % more biomass than 0N–0N. Soil total N increased (Sun Grant: 47 % by 2020; Energy Farm: 58 % by 2023), while Mehlich-3 P (42 %–44 %) and K (21 %–46 %) declined. These findings identify tiller weight as a key determinant of biomass yield in aging miscanthus and highlight the need for P and K management for long-term productivity.

miscanthus↗
DOE OSTI2022

C fluxes from incubations of California upland soil with and without synthetic iron (hydr)oxide associations

There is a growing understanding that interactions with soil mineral phases contribute to the accumulation and retention of otherwise degradable organic matter in soils and sediments. However, the bioavailability of organic compounds in mineral-organic-associations, especially under varying environmental conditions is not well known. To assess the impact of mineral association and warming on the decomposition of an easily respirable organic substrate (glucose), we conducted a series of laboratory incubations at different temperatures with field-collected soils from 10 to 20 cm, 50–60 cm, and 80–90 cm depth at the Blodgett Forest Research Station. We added 13C-labeled glucose either directly to native soil or sorbed to one of two synthetic iron (hydr)oxide phases (goethite and ferrihydrite) that differ in crystallinity and affinity for sorbing glucose. We incubated the soils at 25 deg C. This dataset comprises the added glucose C and the cumulative fluxes over 72 and 1896 hours. We found that: (1) association with the Fe (hydr)oxide minerals reduced the decomposition rate of glucose by > 99.5% relative to rate of decomposition for free glucose in soil; (2) the respiration rate per gram carbon did not differ appreciably with depth, suggesting a similar degree of decomposability for native C across depths and that under the incubation conditions total carbon availability represents the principal limitation on respiration under these conditions as opposed to reduced abundance of decomposers or moisture and oxygen limitations; (3) addition of free glucose enhanced native carbon respiration at all soil depths with the largest effect at 50–60 cm; (4) in general respiration of the organo-mineral complex (glucose and iron-(hydr)oxide) was less temperature sensitive than was respiration of native carbon; (5) the addition of organic free mineral decreased the rate of soil respiration in the intermediate 50–60 cm depth soil. The results emphasize the key role of MOAs in regulating the fluxes of carbon from soils to the atmosphere and in turn the stocks of soil carbon.This dataset lists the glucose additions made to soils with and without added geothite or ferrihidrite and the C respired over the timespan of the incubations.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2020

Cellular Response to Proton Irradiation: A Simulation Study with TOPAS-nBio

The cellular response to ionizing radiation continues to be of significant research interest in cancer radiotherapy, and DNA is recognized as the critical target for most of the biologic effects of radiation. Incident particles can cause initial DNA damages through physical and chemical interactions within a short time scale. Initial DNA damages can undergo repair via different pathways available at different stages of the cell cycle. The misrepair of DNA damage results in genomic rearrangement and causes mutations and chromosome aberrations, which are drivers of cell death. This work presents an integrated study of simulating cell response after proton irradiation with energies of 0.5–500 MeV (LET of 60–0.2 keV/µm). A model of a whole nucleus with fractal DNA geometry was implemented in TOPAS-nBio for initial DNA damage simulations. The default physics and chemistry models in TOPAS-nBio were used to describe interactions of primary particles, secondary particles, and radiolysis products within the nucleus. The initial DNA double-strand break (DSB) yield was found to increase from 6.5 DSB/Gy/Gbp at low-linear energy transfer (LET) of 0.2 keV/µm to 21.2 DSB/Gy/Gbp at high LET of 60 keV/µm. A mechanistic repair model was applied to predict the characteristics of DNA damage repair and dose response of chromosome aberrations. It was found that more than 95% of the DSBs are repaired within the first 24 h and the misrepaired DSB fraction increases rapidly with LET and reaches 15.8% at 60 keV/µm with an estimated chromosome aberration detection threshold of 3 Mbp. The dicentric and acentric fragment yields and the dose response of micronuclei formation after proton irradiation were calculated and compared with experimental results.

62 RADIOLOGY AND NUCLEAR MEDICINE↗
DOE OSTI2020

Materials Data on Ni3(AsO4)2 by Materials Project

Ni3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with three NiO6 octahedra, corners with six AsO4 tetrahedra, and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 52–60°. There are a spread of Ni–O bond distances ranging from 2.00–2.16 Å. In the second Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with two NiO6 octahedra, corners with four AsO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one AsO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–60°. There are a spread of Ni–O bond distances ranging from 2.05–2.24 Å. In the third Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with three NiO6 octahedra, corners with four AsO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one AsO4 tetrahedra. The corner-sharing octahedra tilt angles range from 52–55°. There are a spread of Ni–O bond distances ranging from 2.02–2.22 Å. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with five NiO6 octahedra and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 53–60°. There are a spread of As–O bond distances ranging from 1.71–1.77 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with nine NiO6 octahedra. The corner-sharing octahedra tilt angles range from 50–61°. There is three shorter (1.73 Å) and one longer (1.78 Å) As–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ni2+ and one As5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to three Ni2+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ni2+ and one As5+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2Bi(PO4)2 by Materials Project

Li2Bi(PO4)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share a cornercorner with one BiO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are a spread of Li–O bond distances ranging from 1.95–2.08 Å. In the second Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.04–2.59 Å. In the third Li1+ site, Li1+ is bonded in a distorted T-shaped geometry to three O2- atoms. All Li–O bond lengths are 1.94 Å. In the fourth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share a cornercorner with one BiO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are a spread of Li–O bond distances ranging from 1.95–2.07 Å. In the fifth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share a cornercorner with one BiO6 octahedra and corners with four PO4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are a spread of Li–O bond distances ranging from 1.95–2.08 Å. In the sixth Li1+ site, Li1+ is bonded in a distorted trigonal planar geometry to three O2- atoms. All Li–O bond lengths are 1.95 Å. There are three inequivalent Bi5+ sites. In the first Bi5+ site, Bi5+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Bi–O bond distances ranging from 2.42–2.47 Å. In the second Bi5+ site, Bi5+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (2.17 Å) and three longer (2.20 Å) Bi–O bond lengths. In the third Bi5+ site, Bi5+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with three LiO4 tetrahedra and corners with six PO4 tetrahedra. There are three shorter (2.22 Å) and three longer (2.39 Å) Bi–O bond lengths. There are six inequivalent P+4.50+ sites. In the first P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and corners with three LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–60°. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. In the second P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and a cornercorner with one LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 37–51°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. In the third P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and corners with three LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–60°. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. In the fourth P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and a cornercorner with one LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–51°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. In the fifth P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and corners with three LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 44–60°. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. In the sixth P+4.50+ site, P+4.50+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two BiO6 octahedra and a cornercorner with one LiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–51°. There are a spread of P–O bond distances ranging from 1.52–1.58 Å. There are twenty-three inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two Li1+ and one P+4.50+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi5+ and one P+4.50+ atom. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to two Li1+ and one P+4.50+ atom. In the eighth O2- site, O2- is bonded in a trigonal planar geometry to two Li1+ and one P+4.50+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi5+ and one P+4.50+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the twelfth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two Li1+ and one P+4.50+ atom. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi5+ and one P+4.50+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Bi5+ and one P+4.50+ atom. In the seventeenth O2- site, O2- is bonded in a trigonal non-coplanar geometry to two Li1+ and one P+4.50+ atom. In the eighteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Bi5+, and one P+4.50+ atom. In the twenty-second O2- site, O2- is bonded in a trigonal non-coplanar geometry to two Li1+ and one P+4.50+ atom. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to one Bi5+ and one P+4.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgAl2O4 by Materials Project

MgAl2O4 is Spinel-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 57–61°. There is three shorter (1.92 Å) and one longer (2.01 Å) Mg–O bond length. In the second Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 56–63°. There is three shorter (1.93 Å) and one longer (1.97 Å) Mg–O bond length. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent AlO4 tetrahedra, and edges with six AlO6 octahedra. There are three shorter (2.00 Å) and three longer (2.10 Å) Mg–O bond lengths. In the fourth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. There is one shorter (1.93 Å) and three longer (1.96 Å) Mg–O bond length. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent AlO4 tetrahedra, and edges with six AlO6 octahedra. There are three shorter (2.03 Å) and three longer (2.08 Å) Mg–O bond lengths. In the sixth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–60°. There is one shorter (1.95 Å) and three longer (1.96 Å) Mg–O bond length. In the seventh Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 58–62°. There is three shorter (1.97 Å) and one longer (2.00 Å) Mg–O bond length. In the eighth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–62°. There is three shorter (1.96 Å) and one longer (2.01 Å) Mg–O bond length. There are eight inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with three MgO4 tetrahedra, corners with three AlO4 tetrahedra, edges with two MgO6 octahedra, and edges with four equivalent AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.88–2.04 Å. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share a cornercorner with one AlO4 tetrahedra, corners with five MgO4 tetrahedra, an edgeedge with one MgO6 octahedra, and edges with five AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.88–2.07 Å. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.92–1.95 Å. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 55–60°. There is three shorter (1.84 Å) and one longer (1.85 Å) Al–O bond length. In the fifth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There is three shorter (1.91 Å) and three longer (1.95 Å) Al–O bond length. In the sixth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with two equivalent AlO4 tetrahedra, corners with four MgO4 tetrahedra, an edgeedge with one MgO6 octahedra, and edges with five AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.92–1.98 Å. In the seventh Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There is three shorter (1.92 Å) and three longer (1.94 Å) Al–O bond length. In the eighth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 55–61°. There is three shorter (1.83 Å) and one longer (1.86 Å) Al–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two equivalent Al3+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three equivalent Al3+ atoms. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Al3+ atoms. In the fourth O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two equivalent Al3+ atoms. In the fifth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form distorted corner-sharing OMgAl3 trigonal pyramids. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Al3+ atoms. In the seventh O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 tetrahedra. In the eighth O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the ninth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the tenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Al3+ atoms. In the eleventh O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the twelfth O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the thirteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the fourteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the fifteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Al3+ atoms. In the sixteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form corner-sharing OMgAl3 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg10(Fe3O8)3 by Materials Project

Mg10(Fe3O8)3 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are ten inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent MgO4 tetrahedra, corners with four FeO4 tetrahedra, edges with two MgO6 octahedra, and edges with four FeO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.06–2.12 Å. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six FeO4 tetrahedra, edges with three MgO6 octahedra, and edges with three FeO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.08–2.13 Å. In the third Mg site, Mg is bonded to four O atoms to form MgO4 tetrahedra that share corners with six MgO6 octahedra and corners with six FeO6 octahedra. The corner-sharing octahedra tilt angles range from 53–60°. There are a spread of Mg–O bond distances ranging from 1.98–2.02 Å. In the fourth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share a cornercorner with one MgO4 tetrahedra, corners with two equivalent FeO4 tetrahedra, edges with three MgO6 octahedra, and edges with four FeO6 octahedra. There are a spread of Mg–O bond distances ranging from 1.99–2.24 Å. In the fifth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent FeO4 tetrahedra, edges with two MgO6 octahedra, and edges with four FeO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.05–2.13 Å. In the sixth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six FeO6 octahedra, an edgeedge with one FeO6 octahedra, and edges with five MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–5°. There are a spread of Mg–O bond distances ranging from 2.08–2.16 Å. In the seventh Mg site, Mg is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Mg–O bond distances ranging from 1.84–2.09 Å. In the eighth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share edges with three FeO6 octahedra and edges with five MgO6 octahedra. There are a spread of Mg–O bond distances ranging from 1.95–2.18 Å. In the ninth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with three FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with five MgO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.02–2.22 Å. In the tenth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with three FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with five MgO6 octahedra. There are a spread of Mg–O bond distances ranging from 2.01–2.26 Å. There are nine inequivalent Fe sites. In the first Fe site, Fe is bonded to four O atoms to form FeO4 tetrahedra that share corners with four FeO6 octahedra and corners with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 53–59°. There is one shorter (1.89 Å) and three longer (1.95 Å) Fe–O bond length. In the second Fe site, Fe is bonded to four O atoms to form FeO4 tetrahedra that share corners with five FeO6 octahedra and corners with seven MgO6 octahedra. The corner-sharing octahedra tilt angles range from 54–60°. There are a spread of Fe–O bond distances ranging from 1.93–1.99 Å. In the third Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent MgO4 tetrahedra, corners with four FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with four MgO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.93–2.11 Å. In the fourth Fe site, Fe is bonded to four O atoms to form FeO4 tetrahedra that share corners with six MgO6 octahedra and corners with six FeO6 octahedra. The corner-sharing octahedra tilt angles range from 55–60°. There are a spread of Fe–O bond distances ranging from 1.92–1.98 Å. In the fifth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with three equivalent MgO6 octahedra, a cornercorner with one MgO4 tetrahedra, corners with two equivalent FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with four MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of Fe–O bond distances ranging from 2.02–2.17 Å. In the sixth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent MgO4 tetrahedra, corners with four FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with four MgO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.92–2.11 Å. In the seventh Fe site, Fe is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are a spread of Fe–O bond distances ranging from 1.80–2.04 Å. In the eighth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share a cornercorner with one MgO4 tetrahedra, corners with two equivalent FeO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with five MgO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.91–2.29 Å. In the ninth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with three equivalent MgO6 octahedra, corners with three FeO4 tetrahedra, and edges with six MgO6 octahedra. The corner-sharing octahedra tilt angles range from 2–5°. There are a spread of Fe–O bond distances ranging from 2.02–2.20 Å. There are twenty-four inequivalent O sites. In the first O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the second O site, O is bonded in a rectangular see-saw-like geometry to one Mg and three Fe atoms. In the third O site, O is bonded in a rectangular see-saw-like geometry to one Mg and three Fe atoms. In the fourth O site, O is bonded in a distorted rectangular see-saw-like geometry to two Mg and two Fe atoms. In the fifth O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the sixth O site, O is bonded to three Mg and one Fe atom to form distorted OMg3Fe trigonal pyramids that share corners with two OMg2Fe2 trigonal pyramids and an edgeedge with one OMg3Fe trigonal pyramid. In the seventh O site, O is bonded in a rectangular see-saw-like geometry to one Mg and three Fe atoms. In the eighth O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the ninth O site, O is bonded to two Mg and three Fe atoms to form OMg2Fe3 square pyramids that share corners with three OMg3Fe2 square pyramids, corners with three OMg3Fe tetrahedra, edges with four OMg3Fe2 square pyramids, and an edgeedge with one OMg2Fe2 trigonal pyramid. In the tenth O site, O is bonded in a rectangular see-saw-like geometry to one Mg and three Fe atoms. In the eleventh O site, O is bonded to two Mg and two Fe atoms to form distorted OMg2Fe2 trigonal pyramids that share corners with two OMg3Fe2 square pyramids, corners with two equivalent OMg3Fe tetrahedra, corners with two OMg3Fe trigonal pyramids, and an edgeedge with one OMg2Fe3 square pyramid. In the twelfth O site, O is bonded to three Mg and one Fe atom to form a mixture of distorted corner and edge-sharing OMg3Fe trigonal pyramids. In the thirteenth O site, O is bonded to three Mg and two Fe atoms to form OMg3Fe2 square pyramids that share corners with three OMg4Fe square pyramids, corners with two OMg3Fe tetrahedra, edges with five OMg3Fe2 square pyramids, and an edgeedge with one OMg3Fe tetrahedra. In the fourteenth O site, O is bonded to three Mg and one Fe atom to form OMg3Fe tetrahedra that share corners with seven OMg3Fe2 square pyramids, a cornercorner with one OMg3Fe tetrahedra, corners with two equivalent OMg2Fe2 trigonal pyramids, and edges with two OMg3Fe2 square pyramids. In the fifteenth O site, O is bonded to three Mg and two Fe atoms to form OMg3Fe2 square pyramids that share corners with three OMg3Fe2 square pyramids, corners with two OMg3Fe tetrahedra, edges with five OMg4Fe square pyramids, and an edgeedge with one OMg3Fe tetrahedra. In the sixteenth O site, O is bonded to three Mg and two Fe atoms to form OMg3Fe2 square pyramids that share corners with three OMg3Fe2 square pyramids, corners with two OMg3Fe tetrahedra, a cornercorner with one OMg2Fe2 trigonal pyramid, edges with five OMg4Fe square pyramids, and an edgeedge with one OMg3Fe tetrahedra. In the seventeenth O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the eighteenth O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the nineteenth O site, O is bonded to four Mg and one Fe atom to form OMg4Fe square pyramids that share corners with three OMg2Fe3 square pyramids, corners with two OMg3Fe tetrahedra, a cornercorner with one OMg2Fe2 trigonal pyramid, edges with five OMg3Fe2 square pyramids, and an edgeedge with one OMg3Fe tetrahedra. In the twentieth O site, O is bonded to three Mg and one Fe atom to form OMg3Fe tetrahedra that share corners with seven OMg3Fe2 square pyramids, a cornercorner with one OMg3Fe tetrahedra, and edges with two OMg3Fe2 square pyramids. In the twenty-first O site, O is bonded in a rectangular see-saw-like geometry to three Mg and one Fe atom. In the twenty-second O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms. In the twenty-third O site, O is bonded to four Mg and one Fe atom to form OMg4Fe square pyramids that share corners with three OMg3Fe2 square pyramids, corners with three OMg3Fe tetrahedra, and edges with four OMg3Fe2 square pyramids. In the twenty-fourth O site, O is bonded in a rectangular see-saw-like geometry to two Mg and two Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgAl2O4 by Materials Project

MgAl2O4 is Spinel-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 57–62°. There is three shorter (1.93 Å) and one longer (2.01 Å) Mg–O bond length. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three equivalent MgO4 tetrahedra, corners with three equivalent AlO4 tetrahedra, and edges with six AlO6 octahedra. There are three shorter (2.02 Å) and three longer (2.11 Å) Mg–O bond lengths. In the third Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. There is one shorter (1.94 Å) and three longer (1.95 Å) Mg–O bond length. In the fourth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–60°. There is one shorter (1.95 Å) and three longer (1.97 Å) Mg–O bond length. In the fifth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–61°. There is three shorter (1.98 Å) and one longer (1.99 Å) Mg–O bond length. In the sixth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Mg–O bond lengths are 1.96 Å. In the seventh Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–60°. There is three shorter (1.96 Å) and one longer (1.97 Å) Mg–O bond length. In the eighth Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve AlO6 octahedra. The corner-sharing octahedra tilt angles range from 59–62°. There is three shorter (1.96 Å) and one longer (2.01 Å) Mg–O bond length. There are eight inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share a cornercorner with one AlO4 tetrahedra, corners with five MgO4 tetrahedra, an edgeedge with one MgO6 octahedra, and edges with five AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.89–2.07 Å. In the second Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. All Al–O bond lengths are 1.93 Å. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There is two shorter (1.93 Å) and four longer (1.94 Å) Al–O bond length. In the fourth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There is three shorter (1.93 Å) and three longer (1.95 Å) Al–O bond length. In the fifth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.93–1.95 Å. In the sixth Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with six MgO4 tetrahedra and edges with six AlO6 octahedra. There is three shorter (1.92 Å) and three longer (1.94 Å) Al–O bond length. In the seventh Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with two equivalent AlO4 tetrahedra, corners with four MgO4 tetrahedra, an edgeedge with one MgO6 octahedra, and edges with five AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.92–1.98 Å. In the eighth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with three equivalent MgO6 octahedra and corners with nine AlO6 octahedra. The corner-sharing octahedra tilt angles range from 55–61°. There is one shorter (1.82 Å) and three longer (1.83 Å) Al–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two Mg2+ and two equivalent Al3+ atoms. In the second O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form distorted corner-sharing OMgAl3 trigonal pyramids. In the third O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 tetrahedra. In the fourth O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the fifth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Al3+ atoms. In the seventh O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the eighth O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the ninth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the tenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the eleventh O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the twelfth O2- site, O2- is bonded to one Mg2+ and three Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the thirteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 tetrahedra. In the fourteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form a mixture of distorted edge and corner-sharing OMgAl3 trigonal pyramids. In the fifteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Al3+ atoms. In the sixteenth O2- site, O2- is bonded to one Mg2+ and three equivalent Al3+ atoms to form corner-sharing OMgAl3 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Dy(CrS2)3 by Materials Project

Dy(CrS2)3 crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. there are three inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Dy–S bond distances ranging from 2.80–3.07 Å. In the second Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Dy–S bond distances ranging from 2.78–3.03 Å. In the third Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Dy–S bond distances ranging from 2.79–2.87 Å. There are eight inequivalent Cr3+ sites. In the first Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 51–56°. There are a spread of Cr–S bond distances ranging from 2.36–2.56 Å. In the second Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 49–60°. There are a spread of Cr–S bond distances ranging from 2.32–2.48 Å. In the third Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 47–59°. There are a spread of Cr–S bond distances ranging from 2.37–2.48 Å. In the fourth Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 50–59°. There are a spread of Cr–S bond distances ranging from 2.40–2.43 Å. In the fifth Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 49–59°. There are a spread of Cr–S bond distances ranging from 2.36–2.49 Å. In the sixth Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 50–60°. There are a spread of Cr–S bond distances ranging from 2.36–2.53 Å. In the seventh Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 48–58°. There are a spread of Cr–S bond distances ranging from 2.34–2.58 Å. In the eighth Cr3+ site, Cr3+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing CrS6 octahedra. The corner-sharing octahedra tilt angles range from 47–60°. There are a spread of Cr–S bond distances ranging from 2.37–2.44 Å. There are sixteen inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to two Dy3+ and three Cr3+ atoms. In the second S2- site, S2- is bonded in a 3-coordinate geometry to three Cr3+ atoms. In the third S2- site, S2- is bonded in a distorted trigonal planar geometry to three Cr3+ atoms. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to two Dy3+ and three Cr3+ atoms. In the fifth S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent Dy3+ and three Cr3+ atoms. In the sixth S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent Dy3+ and three Cr3+ atoms. In the seventh S2- site, S2- is bonded in a 3-coordinate geometry to three Cr3+ atoms. In the eighth S2- site, S2- is bonded to two equivalent Dy3+ and three Cr3+ atoms to form distorted SDy2Cr3 square pyramids that share corners with six SDy2Cr3 trigonal bipyramids, corners with four equivalent SDyCr3 trigonal pyramids, edges with two equivalent SDy2Cr3 trigonal bipyramids, and edges with four SDyCr3 trigonal pyramids. In the ninth S2- site, S2- is bonded to one Dy3+ and three Cr3+ atoms to form distorted SDyCr3 trigonal pyramids that share a cornercorner with one SDy2Cr3 trigonal bipyramid, corners with seven SDyCr3 trigonal pyramids, an edgeedge with one SDy2Cr3 square pyramid, an edgeedge with one SDy2Cr3 trigonal bipyramid, and edges with two SDyCr3 trigonal pyramids. In the tenth S2- site, S2- is bonded to one Dy3+ and three Cr3+ atoms to form distorted SDyCr3 trigonal pyramids that share corners with two equivalent SDy2Cr3 square pyramids, corners with two equivalent SDy2Cr3 trigonal bipyramids, corners with five SDyCr3 trigonal pyramids, and edges with three SDy2Cr3 trigonal bipyramids. In the eleventh S2- site, S2- is bonded to one Dy3+ and three Cr3+ atoms to form distorted SDyCr3 trigonal pyramids that share a cornercorner with one SDy2Cr3 trigonal bipyramid, corners with seven SDyCr3 trigonal pyramids, edges with two SDy2Cr3 trigonal bipyramids, and an edgeedge with one SDyCr3 trigonal pyramid. In the twelfth S2- site, S2- is bonded to one Dy3+ and three Cr3+ atoms to form distorted SDyCr3 trigonal pyramids that share corners with two equivalent SDy2Cr3 trigonal bipyramids, corners with five SDyCr3 trigonal pyramids, an edgeedge with one SDy2Cr3 square pyramid, edges with two SDy2Cr3 trigonal bipyramids, and an edgeedge with one SDyCr3 trigonal pyramid. In the thirteenth S2- site, S2- is bonded to one Dy3+ and three Cr3+ atoms to form distorted SDyCr3 trigonal pyramids that share corners with two SDy2Cr3 trigonal bipyramids, corners with eight SDyCr3 trigonal pyramids, an edgeedge with one SDy2Cr3 trigonal bipyramid, and an edgeedge with one SDyCr3 trigonal pyramid. In the fourteenth S2- site, S2- is bonded to two Dy3+ and three Cr3+ atoms to form distorted SDy2Cr3 trigonal bipyramids that share corners with three SDy2Cr3 trigonal bipyramids, corners with three SDyCr3 trigonal pyramids, an edgeedge with one SDy2Cr3 square pyramid, edges with three SDy2Cr3 trigonal bipyramids, and edges with three SDyCr3 trigonal pyramids. In the fifteenth S2- site, S2- is bonded to two Dy3+ and three Cr3+ atoms to form distorted SDy2Cr3 trigonal bipyramids that share a cornercorner with one SDy2Cr3 square pyramid, corners with three SDy2Cr3 trigonal bipyramids, corners with three SDyCr3 trigonal pyramids, edges with three SDy2Cr3 trigonal bipyramids, and edges with three SDyCr3 trigonal pyramids. In the sixteenth S2- site, S2- is bonded to two Dy3+ and three Cr3+ atoms to form distorted SDy2Cr3 trigonal bipyramids that share corners with two equivalent SDy2Cr3 square pyramids, corners with four SDy2Cr3 trigonal bipyramids, corners with two SDyCr3 trigonal pyramids, edges with three SDy2Cr3 trigonal bipyramids, and edges with three SDyCr3 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cd(GaO2)2 by Materials Project

CdGa2O4 is Spinel-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are eight inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 56–68°. There are three shorter (2.14 Å) and one longer (2.22 Å) Cd–O bond lengths. In the second Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 56–70°. All Cd–O bond lengths are 2.15 Å. In the third Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–64°. There are three shorter (2.18 Å) and one longer (2.23 Å) Cd–O bond lengths. In the fourth Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with three equivalent CdO4 tetrahedra, corners with three equivalent GaO4 tetrahedra, and edges with six GaO6 octahedra. There are three shorter (2.24 Å) and three longer (2.31 Å) Cd–O bond lengths. In the fifth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 59–61°. There are one shorter (2.12 Å) and three longer (2.16 Å) Cd–O bond lengths. In the sixth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–65°. There are three shorter (2.17 Å) and one longer (2.25 Å) Cd–O bond lengths. In the seventh Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with three equivalent CdO4 tetrahedra, corners with three equivalent GaO4 tetrahedra, and edges with six GaO6 octahedra. There are three shorter (2.26 Å) and three longer (2.30 Å) Cd–O bond lengths. In the eighth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–61°. All Cd–O bond lengths are 2.17 Å. There are eight inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 53–63°. There is three shorter (1.93 Å) and one longer (2.00 Å) Ga–O bond length. In the second Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 52–63°. There is one shorter (1.95 Å) and three longer (1.97 Å) Ga–O bond length. In the third Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with three CdO4 tetrahedra, corners with three GaO4 tetrahedra, edges with two CdO6 octahedra, and edges with four equivalent GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 1.96–2.21 Å. In the fourth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share a cornercorner with one GaO4 tetrahedra, corners with five CdO4 tetrahedra, an edgeedge with one CdO6 octahedra, and edges with five GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 1.96–2.29 Å. In the fifth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are two shorter (2.02 Å) and four longer (2.05 Å) Ga–O bond lengths. In the sixth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.02 Å) and three longer (2.05 Å) Ga–O bond lengths. In the seventh Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with two equivalent GaO4 tetrahedra, corners with four CdO4 tetrahedra, an edgeedge with one CdO6 octahedra, and edges with five GaO6 octahedra. There are four shorter (2.02 Å) and two longer (2.12 Å) Ga–O bond lengths. In the eighth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.02 Å) and three longer (2.04 Å) Ga–O bond lengths. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded to two Cd2+ and two equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCd2Ga2 trigonal pyramids. In the second O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 trigonal pyramids. In the third O2- site, O2- is bonded to two Cd2+ and two equivalent Ga3+ atoms to form distorted OCd2Ga2 trigonal pyramids that share corners with four equivalent OCdGa3 tetrahedra, corners with three OCdGa3 trigonal pyramids, and edges with three OCd2Ga2 trigonal pyramids. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Cd2+ and three Ga3+ atoms. In the fifth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form distorted OCdGa3 trigonal pyramids that share corners with nine OCdGa3 tetrahedra and edges with three equivalent OCd2Ga2 trigonal pyramids. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Ga3+ atoms. In the seventh O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the eighth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form OCdGa3 tetrahedra that share corners with six OCdGa3 tetrahedra, corners with six OCd2Ga2 trigonal pyramids, and edges with two equivalent OCdGa3 tetrahedra. In the ninth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the tenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to four Ga3+ atoms. In the eleventh O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the twelfth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the thirteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form distorted OCdGa3 trigonal pyramids that share corners with three equivalent OCdGa3 tetrahedra, corners with three equivalent OCd2Ga2 trigonal pyramids, and edges with three equivalent OCdGa3 tetrahedra. In the fourteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the fifteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Cd2+ and three Ga3+ atoms. In the sixteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form corner-sharing OCdGa3 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cd(GaO2)2 by Materials Project

CdGa2O4 is Spinel-like structured and crystallizes in the trigonal P3m1 space group. The structure is three-dimensional. there are twelve inequivalent Cd2+ sites. In the first Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 57–67°. There are three shorter (2.13 Å) and one longer (2.22 Å) Cd–O bond lengths. In the second Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with three equivalent CdO4 tetrahedra, corners with three equivalent GaO4 tetrahedra, and edges with six GaO6 octahedra. There are three shorter (2.24 Å) and three longer (2.32 Å) Cd–O bond lengths. In the third Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 56–69°. There are three shorter (2.14 Å) and one longer (2.16 Å) Cd–O bond lengths. In the fourth Cd2+ site, Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with three equivalent CdO4 tetrahedra, corners with three equivalent GaO4 tetrahedra, and edges with six GaO6 octahedra. There are three shorter (2.26 Å) and three longer (2.31 Å) Cd–O bond lengths. In the fifth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 59–62°. There are one shorter (2.13 Å) and three longer (2.16 Å) Cd–O bond lengths. In the sixth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedral tilt angles are 61°. There are three shorter (2.17 Å) and one longer (2.18 Å) Cd–O bond lengths. In the seventh Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–64°. There are three shorter (2.18 Å) and one longer (2.22 Å) Cd–O bond lengths. In the eighth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 61–62°. There are one shorter (2.15 Å) and three longer (2.17 Å) Cd–O bond lengths. In the ninth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 61–62°. There are one shorter (2.16 Å) and three longer (2.17 Å) Cd–O bond lengths. In the tenth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedral tilt angles are 61°. There are three shorter (2.17 Å) and one longer (2.18 Å) Cd–O bond lengths. In the eleventh Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–61°. There are three shorter (2.16 Å) and one longer (2.18 Å) Cd–O bond lengths. In the twelfth Cd2+ site, Cd2+ is bonded to four O2- atoms to form CdO4 tetrahedra that share corners with twelve GaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–65°. There are three shorter (2.17 Å) and one longer (2.24 Å) Cd–O bond lengths. There are twelve inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 53–63°. There is three shorter (1.93 Å) and one longer (1.98 Å) Ga–O bond length. In the second Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with three CdO4 tetrahedra, corners with three GaO4 tetrahedra, edges with two CdO6 octahedra, and edges with four equivalent GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 1.96–2.22 Å. In the third Ga3+ site, Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with three equivalent CdO6 octahedra and corners with nine GaO6 octahedra. The corner-sharing octahedra tilt angles range from 52–63°. There is one shorter (1.93 Å) and three longer (1.97 Å) Ga–O bond length. In the fourth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share a cornercorner with one GaO4 tetrahedra, corners with five CdO4 tetrahedra, an edgeedge with one CdO6 octahedra, and edges with five GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 1.96–2.30 Å. In the fifth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are two shorter (2.03 Å) and four longer (2.05 Å) Ga–O bond lengths. In the sixth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.02 Å) and three longer (2.04 Å) Ga–O bond lengths. In the seventh Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 2.03–2.05 Å. In the eighth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.03 Å) and three longer (2.05 Å) Ga–O bond lengths. In the ninth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are a spread of Ga–O bond distances ranging from 2.03–2.05 Å. In the tenth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.03 Å) and three longer (2.05 Å) Ga–O bond lengths. In the eleventh Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with two equivalent GaO4 tetrahedra, corners with four CdO4 tetrahedra, an edgeedge with one CdO6 octahedra, and edges with five GaO6 octahedra. There are four shorter (2.02 Å) and two longer (2.12 Å) Ga–O bond lengths. In the twelfth Ga3+ site, Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six CdO4 tetrahedra and edges with six GaO6 octahedra. There are three shorter (2.02 Å) and three longer (2.03 Å) Ga–O bond lengths. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded to two Cd2+ and two equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCd2Ga2 trigonal pyramids. In the second O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 trigonal pyramids. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Cd2+ and three Ga3+ atoms. In the fourth O2- site, O2- is bonded to two Cd2+ and two equivalent Ga3+ atoms to form distorted OCd2Ga2 trigonal pyramids that share corners with four equivalent OCdGa3 tetrahedra, corners with three OCdGa3 trigonal pyramids, and edges with three OCd2Ga2 trigonal pyramids. In the fifth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Ga3+ atoms. In the sixth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form distorted OCdGa3 trigonal pyramids that share corners with nine OCdGa3 tetrahedra and edges with three equivalent OCd2Ga2 trigonal pyramids. In the seventh O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form OCdGa3 tetrahedra that share corners with six OCdGa3 tetrahedra, corners with six OCd2Ga2 trigonal pyramids, and edges with two equivalent OCdGa3 tetrahedra. In the eighth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the ninth O2- site, O2- is bonded in a rectangular see-saw-like geometry to four Ga3+ atoms. In the tenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the eleventh O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the twelfth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the thirteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the fourteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the fifteenth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the sixteenth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the seventeenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the eighteenth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the nineteenth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the twentieth O2- site, O2- is bonded to one Cd2+ and three Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the twenty-first O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OCdGa3 tetrahedra. In the twenty-second O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form distorted OCdGa3 trigonal pyramids that share corners with three equivalent OCdGa3 tetrahedra, corners with three equivalent OCd2Ga2 trigonal pyramids, and edges with three equivalent OCdGa3 tetrahedra. In the twenty-third O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Cd2+ and three Ga3+ atoms. In the twenty-fourth O2- site, O2- is bonded to one Cd2+ and three equivalent Ga3+ atoms to form corner-sharing OCdGa3 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K4U5Te2O21 by Materials Project

K4U5Te2O21 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded to six O2- atoms to form distorted KO6 octahedra that share corners with two equivalent UO6 octahedra, corners with four UO7 pentagonal bipyramids, and edges with two equivalent KO6 octahedra. The corner-sharing octahedra tilt angles range from 54–60°. There are a spread of K–O bond distances ranging from 2.69–2.87 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.73–3.11 Å. There are three inequivalent U6+ sites. In the first U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share a cornercorner with one KO6 octahedra, an edgeedge with one UO6 octahedra, and edges with two equivalent UO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 60°. There are a spread of U–O bond distances ranging from 1.85–2.43 Å. In the second U6+ site, U6+ is bonded to seven O2- atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent UO6 octahedra, corners with three equivalent KO6 octahedra, a cornercorner with one UO7 pentagonal bipyramid, and edges with two equivalent UO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 48–62°. There are a spread of U–O bond distances ranging from 1.86–2.61 Å. In the third U6+ site, U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with four equivalent KO6 octahedra, corners with four equivalent UO7 pentagonal bipyramids, and edges with two equivalent UO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 54–60°. There are a spread of U–O bond distances ranging from 1.87–2.28 Å. Te4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 1.88–1.91 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one K1+ and three U6+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one U6+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one K1+, one U6+, and one Te4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and one U6+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two K1+ and one U6+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one U6+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to three U6+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two U6+ and one Te4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two U6+ and one Te4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one U6+ atom. In the eleventh O2- site, O2- is bonded in a linear geometry to two equivalent U6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Fe7S8 by Materials Project

Fe7S8 crystallizes in the trigonal P3_121 space group. The structure is three-dimensional. there are five inequivalent Fe+2.29+ sites. In the first Fe+2.29+ site, Fe+2.29+ is bonded in a 5-coordinate geometry to five S2- atoms. There are a spread of Fe–S bond distances ranging from 2.10–2.31 Å. In the second Fe+2.29+ site, Fe+2.29+ is bonded to six S2- atoms to form a mixture of distorted corner, edge, and face-sharing FeS6 octahedra. The corner-sharing octahedra tilt angles range from 50–51°. There are a spread of Fe–S bond distances ranging from 2.18–2.37 Å. In the third Fe+2.29+ site, Fe+2.29+ is bonded to six S2- atoms to form a mixture of corner, edge, and face-sharing FeS6 octahedra. The corner-sharing octahedra tilt angles range from 44–60°. There are a spread of Fe–S bond distances ranging from 2.19–2.40 Å. In the fourth Fe+2.29+ site, Fe+2.29+ is bonded to six S2- atoms to form a mixture of corner, edge, and face-sharing FeS6 octahedra. The corner-sharing octahedra tilt angles range from 50–60°. There are a spread of Fe–S bond distances ranging from 2.20–2.41 Å. In the fifth Fe+2.29+ site, Fe+2.29+ is bonded to six S2- atoms to form a mixture of corner, edge, and face-sharing FeS6 octahedra. The corner-sharing octahedra tilt angles range from 44–60°. There are a spread of Fe–S bond distances ranging from 2.24–2.49 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to five Fe+2.29+ atoms. In the second S2- site, S2- is bonded in a 5-coordinate geometry to five Fe+2.29+ atoms. In the third S2- site, S2- is bonded in a 5-coordinate geometry to five Fe+2.29+ atoms. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to five Fe+2.29+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zr5N5O2 by Materials Project

Zr5N5O2 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are ten inequivalent Zr+3.80+ sites. In the first Zr+3.80+ site, Zr+3.80+ is bonded in a 7-coordinate geometry to five N3- and two equivalent O2- atoms. There are a spread of Zr–N bond distances ranging from 2.31–2.48 Å. Both Zr–O bond lengths are 2.24 Å. In the second Zr+3.80+ site, Zr+3.80+ is bonded to five N3- and one O2- atom to form ZrN5O octahedra that share corners with three ZrN5O octahedra, corners with two equivalent ZrN5O2 pentagonal bipyramids, and edges with five ZrN5O octahedra. The corner-sharing octahedra tilt angles range from 4–62°. There are a spread of Zr–N bond distances ranging from 2.20–2.26 Å. The Zr–O bond length is 2.19 Å. In the third Zr+3.80+ site, Zr+3.80+ is bonded to five N3- and two equivalent O2- atoms to form distorted ZrN5O2 pentagonal bipyramids that share corners with eight ZrN5O octahedra, edges with four ZrN5O octahedra, and faces with two equivalent ZrN5O2 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 20–69°. There are a spread of Zr–N bond distances ranging from 2.28–2.41 Å. Both Zr–O bond lengths are 2.26 Å. In the fourth Zr+3.80+ site, Zr+3.80+ is bonded to three N3- and three O2- atoms to form ZrN3O3 octahedra that share corners with two ZrN5O octahedra and edges with two equivalent ZrN3O3 octahedra. The corner-sharing octahedra tilt angles range from 57–62°. There are one shorter (2.07 Å) and two longer (2.19 Å) Zr–N bond lengths. There are one shorter (2.22 Å) and two longer (2.30 Å) Zr–O bond lengths. In the fifth Zr+3.80+ site, Zr+3.80+ is bonded to six N3- atoms to form ZrN6 octahedra that share corners with three ZrN3O3 octahedra and edges with five ZrN6 octahedra. The corner-sharing octahedra tilt angles range from 5–57°. There are a spread of Zr–N bond distances ranging from 2.15–2.34 Å. In the sixth Zr+3.80+ site, Zr+3.80+ is bonded to five N3- and one O2- atom to form a mixture of edge and corner-sharing ZrN5O octahedra. The corner-sharing octahedra tilt angles range from 5–60°. There are a spread of Zr–N bond distances ranging from 2.20–2.24 Å. The Zr–O bond length is 2.21 Å. In the seventh Zr+3.80+ site, Zr+3.80+ is bonded to four N3- and two O2- atoms to form ZrN4O2 octahedra that share corners with two ZrN5O octahedra, corners with two equivalent ZrN5O2 pentagonal bipyramids, edges with two equivalent ZrN4O2 octahedra, and edges with three equivalent ZrN5O2 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 60°. There are two shorter (2.23 Å) and two longer (2.24 Å) Zr–N bond lengths. There are one shorter (2.14 Å) and one longer (2.16 Å) Zr–O bond lengths. In the eighth Zr+3.80+ site, Zr+3.80+ is bonded in a 7-coordinate geometry to four N3- and three O2- atoms. There are two shorter (2.31 Å) and two longer (2.34 Å) Zr–N bond lengths. There are two shorter (2.23 Å) and one longer (2.47 Å) Zr–O bond lengths. In the ninth Zr+3.80+ site, Zr+3.80+ is bonded to five N3- and one O2- atom to form ZrN5O octahedra that share corners with three ZrN5O octahedra, corners with four equivalent ZrN5O2 pentagonal bipyramids, edges with five ZrN5O octahedra, and an edgeedge with one ZrN5O2 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 4–60°. There are a spread of Zr–N bond distances ranging from 2.20–2.25 Å. The Zr–O bond length is 2.19 Å. In the tenth Zr+3.80+ site, Zr+3.80+ is bonded in a 7-coordinate geometry to five N3- and two equivalent O2- atoms. There are a spread of Zr–N bond distances ranging from 2.18–2.50 Å. Both Zr–O bond lengths are 2.41 Å. There are ten inequivalent N3- sites. In the first N3- site, N3- is bonded in a rectangular see-saw-like geometry to four Zr+3.80+ atoms. In the second N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 square pyramids that share corners with four equivalent OZr4 tetrahedra, corners with six NZr5 trigonal bipyramids, edges with two equivalent NZr5 square pyramids, edges with three OZr4 tetrahedra, and edges with four NZr5 trigonal bipyramids. In the third N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 trigonal bipyramids that share corners with two equivalent NZr5 square pyramids, corners with five OZr4 tetrahedra, corners with two equivalent NZr5 trigonal bipyramids, an edgeedge with one NZr5 square pyramid, an edgeedge with one OZr4 tetrahedra, and edges with four NZr5 trigonal bipyramids. In the fourth N3- site, N3- is bonded to four Zr+3.80+ atoms to form NZr4 tetrahedra that share a cornercorner with one OZr4 tetrahedra, corners with two equivalent NZr4 tetrahedra, corners with five NZr5 trigonal bipyramids, and an edgeedge with one NZr5 trigonal bipyramid. In the fifth N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 trigonal bipyramids that share corners with two equivalent NZr5 square pyramids, a cornercorner with one NZr4 tetrahedra, corners with four equivalent OZr4 tetrahedra, corners with two equivalent NZr5 trigonal bipyramids, an edgeedge with one OZr4 tetrahedra, and edges with five NZr5 trigonal bipyramids. In the sixth N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 trigonal bipyramids that share corners with two equivalent NZr5 square pyramids, corners with four equivalent OZr4 tetrahedra, corners with four NZr5 trigonal bipyramids, edges with three equivalent NZr5 square pyramids, edges with three OZr4 tetrahedra, and edges with three NZr5 trigonal bipyramids. In the seventh N3- site, N3- is bonded in a rectangular see-saw-like geometry to four Zr+3.80+ atoms. In the eighth N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 trigonal bipyramids that share a cornercorner with one OZr4 tetrahedra, corners with four equivalent NZr4 tetrahedra, an edgeedge with one NZr4 tetrahedra, and edges with four NZr5 trigonal bipyramids. In the ninth N3- site, N3- is bonded to five Zr+3.80+ atoms to form distorted NZr5 trigonal bipyramids that share corners with five OZr4 tetrahedra, an edgeedge with one OZr4 tetrahedra, and edges with four NZr5 trigonal bipyramids. In the tenth N3- site, N3- is bonded in a 5-coordinate geometry to five Zr+3.80+ atoms. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to four Zr+3.80+ atoms to form OZr4 tetrahedra that share a cornercorner with one NZr4 tetrahedra, corners with two equivalent OZr4 tetrahedra, corners with five NZr5 trigonal bipyramids, and an edgeedge with one NZr5 trigonal bipyramid. In the second O2- site, O2- is bonded to four Zr+3.80+ atoms to form distorted OZr4 tetrahedra that share corners with four equivalent NZr5 square pyramids, corners with three OZr4 tetrahedra, corners with five NZr5 trigonal bipyramids, an edgeedge with one NZr5 square pyramid, and edges with three NZr5 trigonal bipyramids. In the third O2- site, O2- is bonded in a 5-coordinate geometry to five Zr+3.80+ atoms. In the fourth O2- site, O2- is bonded to four Zr+3.80+ atoms to form OZr4 tetrahedra that share corners with three OZr4 tetrahedra, corners with nine NZr5 trigonal bipyramids, edges with two equivalent NZr5 square pyramids, and edges with two NZr5 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn2GeS4 by Materials Project

Mn2GeS4 is Spinel-like structured and crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are six inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with eight MnS6 octahedra, corners with four GeS4 tetrahedra, edges with two equivalent MnS6 octahedra, and an edgeedge with one GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–56°. There are a spread of Mn–S bond distances ranging from 2.50–2.64 Å. In the second Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with eight MnS6 octahedra, corners with four GeS4 tetrahedra, edges with two equivalent MnS6 octahedra, and an edgeedge with one GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–56°. There are a spread of Mn–S bond distances ranging from 2.50–2.64 Å. In the third Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with eight MnS6 octahedra, corners with four GeS4 tetrahedra, edges with two equivalent MnS6 octahedra, and an edgeedge with one GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–56°. There are a spread of Mn–S bond distances ranging from 2.54–2.68 Å. In the fourth Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with four MnS6 octahedra, corners with two GeS4 tetrahedra, edges with four MnS6 octahedra, and edges with two GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–56°. There are a spread of Mn–S bond distances ranging from 2.54–2.62 Å. In the fifth Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with eight MnS6 octahedra, corners with four GeS4 tetrahedra, edges with two equivalent MnS6 octahedra, and an edgeedge with one GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–56°. There are a spread of Mn–S bond distances ranging from 2.54–2.67 Å. In the sixth Mn2+ site, Mn2+ is bonded to six S2- atoms to form MnS6 octahedra that share corners with four MnS6 octahedra, corners with two GeS4 tetrahedra, edges with four MnS6 octahedra, and edges with two GeS4 tetrahedra. The corner-sharing octahedra tilt angles range from 50–56°. There are a spread of Mn–S bond distances ranging from 2.55–2.62 Å. There are four inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four S2- atoms to form GeS4 tetrahedra that share corners with six MnS6 octahedra and edges with three MnS6 octahedra. The corner-sharing octahedra tilt angles range from 60–63°. There are one shorter (2.23 Å) and three longer (2.26 Å) Ge–S bond lengths. In the second Ge4+ site, Ge4+ is bonded to four S2- atoms to form GeS4 tetrahedra that share corners with six MnS6 octahedra and edges with three MnS6 octahedra. The corner-sharing octahedra tilt angles range from 60–63°. There are a spread of Ge–S bond distances ranging from 2.23–2.27 Å. In the third Ge4+ site, Ge4+ is bonded to four S2- atoms to form GeS4 tetrahedra that share corners with six MnS6 octahedra and edges with three MnS6 octahedra. The corner-sharing octahedra tilt angles range from 59–63°. There are a spread of Ge–S bond distances ranging from 2.22–2.27 Å. In the fourth Ge4+ site, Ge4+ is bonded to four S2- atoms to form GeS4 tetrahedra that share corners with six MnS6 octahedra and edges with three MnS6 octahedra. The corner-sharing octahedra tilt angles range from 60–63°. There are one shorter (2.22 Å) and three longer (2.26 Å) Ge–S bond lengths. There are twelve inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the second S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the third S2- site, S2- is bonded to three Mn2+ and one Ge4+ atom to form distorted corner-sharing SMn3Ge trigonal pyramids. In the fourth S2- site, S2- is bonded to three Mn2+ and one Ge4+ atom to form distorted corner-sharing SMn3Ge tetrahedra. In the fifth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the sixth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the seventh S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the eighth S2- site, S2- is bonded to three Mn2+ and one Ge4+ atom to form distorted corner-sharing SMn3Ge tetrahedra. In the ninth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the tenth S2- site, S2- is bonded to three Mn2+ and one Ge4+ atom to form distorted corner-sharing SMn3Ge tetrahedra. In the eleventh S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom. In the twelfth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Mn2+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCu7TeS5ClO24 by Materials Project

KCu7TeS5O24Cl crystallizes in the tetragonal P4/ncc space group. The structure is three-dimensional. K1+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are four shorter (2.77 Å) and four longer (3.24 Å) K–O bond lengths. There are three inequivalent Cu+2.86+ sites. In the first Cu+2.86+ site, Cu+2.86+ is bonded to five O2- and one Cl1- atom to form distorted CuClO5 octahedra that share corners with two CuClO5 octahedra, a cornercorner with one CuClO4 square pyramid, corners with three SO4 tetrahedra, and edges with three CuClO5 octahedra. The corner-sharing octahedra tilt angles range from 60–66°. There are a spread of Cu–O bond distances ranging from 1.97–2.24 Å. The Cu–Cl bond length is 2.78 Å. In the second Cu+2.86+ site, Cu+2.86+ is bonded to four equivalent O2- and one Cl1- atom to form CuClO4 square pyramids that share corners with four equivalent CuClO5 octahedra and corners with four equivalent SO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. All Cu–O bond lengths are 1.99 Å. The Cu–Cl bond length is 2.57 Å. In the third Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with two equivalent CuClO5 octahedra, corners with four SO4 tetrahedra, and edges with two equivalent CuClO5 octahedra. The corner-sharing octahedral tilt angles are 60°. There are a spread of Cu–O bond distances ranging from 2.00–2.44 Å. Te6+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Te–O bond lengths are 2.06 Å. There are two inequivalent S+4.40+ sites. In the first S+4.40+ site, S+4.40+ is bonded to four O2- atoms to form SO4 tetrahedra that share corners with three CuClO5 octahedra and a cornercorner with one CuClO4 square pyramid. The corner-sharing octahedra tilt angles range from 53–60°. There are a spread of S–O bond distances ranging from 1.48–1.51 Å. In the second S+4.40+ site, S+4.40+ is bonded to four equivalent O2- atoms to form SO4 tetrahedra that share corners with eight CuClO5 octahedra. The corner-sharing octahedra tilt angles range from 46–55°. All S–O bond lengths are 1.49 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cu+2.86+ and one S+4.40+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+, one Cu+2.86+, and one S+4.40+ atom. In the third O2- site, O2- is bonded to three Cu+2.86+ and one Te6+ atom to form a mixture of corner and edge-sharing OCu3Te tetrahedra. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu+2.86+ and one S+4.40+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one K1+, one Cu+2.86+, and one S+4.40+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Cu+2.86+ and one S+4.40+ atom. Cl1- is bonded in a 5-coordinate geometry to five Cu+2.86+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaCa2TiSi2O8F by Materials Project

NaCa2TiSi2O8F crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–3.09 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three CaO6 octahedra, corners with two TiO4 tetrahedra, corners with two SiO3F tetrahedra, edges with two equivalent NaO6 octahedra, and edges with two TiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 75–76°. There are a spread of Na–O bond distances ranging from 2.25–2.83 Å. In the third Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with three CaO6 octahedra, corners with two TiO4 tetrahedra, corners with two SiO3F tetrahedra, edges with two equivalent NaO6 octahedra, and edges with two TiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 74–76°. There are a spread of Na–O bond distances ranging from 2.27–2.83 Å. In the fourth Na1+ site, Na1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–3.11 Å. There are eight inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded to six O2- and one F1- atom to form distorted CaO6F hexagonal pyramids that share a cornercorner with one TiO4 tetrahedra, a cornercorner with one SiO3F tetrahedra, corners with two SiO3F trigonal pyramids, edges with three CaO6 octahedra, and edges with two SiO3F trigonal pyramids. There are a spread of Ca–O bond distances ranging from 2.38–2.68 Å. The Ca–F bond length is 2.63 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share a cornercorner with one TiO4 tetrahedra, corners with five SiO3F tetrahedra, and edges with two CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.40–2.45 Å. In the third Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with two NaO6 octahedra, a cornercorner with one TiO4 tetrahedra, corners with four SiO3F tetrahedra, a cornercorner with one SiO3F trigonal pyramid, an edgeedge with one CaO6F hexagonal pyramid, and an edgeedge with one CaO6 octahedra. The corner-sharing octahedra tilt angles range from 74–75°. There are a spread of Ca–O bond distances ranging from 2.40–2.55 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to six O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.27–2.59 Å. The Ca–F bond length is 2.84 Å. In the fifth Ca2+ site, Ca2+ is bonded to six O2- atoms to form distorted CaO6 octahedra that share corners with two NaO6 octahedra, a cornercorner with one TiO4 tetrahedra, corners with five SiO3F tetrahedra, and edges with three CaO6 octahedra. The corner-sharing octahedral tilt angles are 76°. There are a spread of Ca–O bond distances ranging from 2.35–2.50 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to six O2- and one F1- atom. There are a spread of Ca–O bond distances ranging from 2.33–2.62 Å. The Ca–F bond length is 2.90 Å. In the seventh Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with two NaO6 octahedra, a cornercorner with one TiO4 tetrahedra, corners with five SiO3F tetrahedra, and edges with three CaO6 octahedra. The corner-sharing octahedra tilt angles range from 75–76°. There are a spread of Ca–O bond distances ranging from 2.33–2.53 Å. In the eighth Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share a cornercorner with one TiO4 tetrahedra, a cornercorner with one SiO3F tetrahedra, corners with four SiO3F trigonal pyramids, edges with two equivalent CaO6F hexagonal pyramids, and an edgeedge with one CaO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.27–2.50 Å. There are four inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to four O2- atoms to form TiO4 tetrahedra that share a cornercorner with one CaO6F hexagonal pyramid and corners with two SiO3F trigonal pyramids. There are a spread of Ti–O bond distances ranging from 1.77–1.90 Å. In the second Ti4+ site, Ti4+ is bonded to four O2- atoms to form TiO4 tetrahedra that share a cornercorner with one CaO6 octahedra, corners with two NaO6 octahedra, corners with two SiO3F tetrahedra, and edges with two NaO6 octahedra. The corner-sharing octahedra tilt angles range from 60–69°. There is two shorter (1.79 Å) and two longer (1.90 Å) Ti–O bond length. In the third Ti4+ site, Ti4+ is bonded to four O2- atoms to form TiO4 tetrahedra that share corners with two NaO6 octahedra, corners with two CaO6 octahedra, corners with two SiO3F tetrahedra, and edges with two NaO6 octahedra. The corner-sharing octahedra tilt angles range from 15–66°. There are a spread of Ti–O bond distances ranging from 1.78–1.92 Å. In the fourth Ti4+ site, Ti4+ is bonded to four O2- atoms to form TiO4 tetrahedra that share corners with two CaO6 octahedra and corners with two SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 7–69°. There are a spread of Ti–O bond distances ranging from 1.76–1.93 Å. There are eight inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share a cornercorner with one NaO6 octahedra, corners with three CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 54–60°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.83 Å. In the second Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F trigonal pyramids that share a cornercorner with one CaO6F hexagonal pyramid, corners with two equivalent CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, a cornercorner with one SiO3F trigonal pyramid, and an edgeedge with one CaO6F hexagonal pyramid. The corner-sharing octahedra tilt angles range from 33–56°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.80 Å. In the third Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share a cornercorner with one NaO6 octahedra, corners with four CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 54–69°. There is two shorter (1.60 Å) and one longer (1.62 Å) Si–O bond length. The Si–F bond length is 1.80 Å. In the fourth Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share a cornercorner with one NaO6 octahedra, corners with five CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 52–70°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.81 Å. In the fifth Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share corners with three CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 57–60°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.83 Å. In the sixth Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share corners with three CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 55–61°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.83 Å. In the seventh Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F trigonal pyramids that share a cornercorner with one CaO6F hexagonal pyramid, corners with three CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, a cornercorner with one SiO3F trigonal pyramid, and an edgeedge with one CaO6F hexagonal pyramid. The corner-sharing octahedra tilt angles range from 35–59°. There are a spread of Si–O bond distances ranging from 1.59–1.62 Å. The Si–F bond length is 1.79 Å. In the eighth Si4+ site, Si4+ is bonded to three O2- and one F1- atom to form SiO3F tetrahedra that share a cornercorner with one CaO6F hexagonal pyramid, a cornercorner with one NaO6 octahedra, corners with two equivalent CaO6 octahedra, a cornercorner with one TiO4 tetrahedra, and a cornercorner with one SiO3F tetrahedra. The corner-sharing octahedra tilt angles range from 52–62°. There is one shorter (1.59 Å) and two longer (1.61 Å) Si–O bond length. The Si–F bond length is 1.81 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded to two Na1+, one Ca2+, and one Ti4+ atom to form distorted corner-sharing ONa2CaTi tetrahedra. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ca2+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ti4+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Na1+, one Ca2+, and one Ti4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ti4+, and one Si4+ atom. In the sixth O2- site, O2- is bonded to two Na1+, one Ca2+, and one Ti4+ atom to form distorted corner-sharing ONa2CaTi tetrahedra. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, two Ca2+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the ninth O2- site, O2- is bonded to two Na1+, one Ca2+, and one Ti4+ atom to form distorted corner-sharing ONa2CaTi tetrahedra. In the tenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+, one Ti4+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Na1+, one Ti4+, and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Ca2+, and one Si4+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ca2+ and one Si4+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ti4+, and one Si4+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the sixteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Ti4+, and one Si4+ atom. In the seventeenth O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+ and one Si4+ atom. In the eighteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ti4+, and one Si4+ atom. In the nineteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ca2+ and one Si4+ atom. In the twentieth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ca2+ and one Si4+ atom. In the twenty-first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ca2+ and one Si4+ atom. In the twenty-second O2- site, O2- is bonded to two Na1+, one Ca2+, and one Ti4+ atom to form distorted corner-sharing ONa2CaTi tetrahedra. In the twenty-third O2- site, O2- is bonded in a 1-coordinate geometry to three Ca2+ and one Si4+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ca2+ and one Si4+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted linear geometry to two Na1+, one Ca2+, and one Ti4+ atom. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Ti4+, and one Si4+ atom. In the twenty-seventh O2- site, O2- is bonded in a 1-coordin

36 MATERIALS SCIENCE↗