Search NASA⌕ Search

SEARCH · Search NASA

Results for “Cu3(OF)2”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 109 records · Page 6
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on ZnCu2H4(SO4)2 by Materials Project

Cu2ZnH4(SO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Cu3+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of Cu–O bond distances ranging from 2.10–2.17 Å. Zn2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.02–2.21 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. S2+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of S–O bond distances ranging from 1.52–1.55 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cu3+, one Zn2+, and one S2+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cu3+, one Zn2+, and one S2+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu3+ and one S2+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Zn2+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(CuO2)2 by Materials Project

Zn(CuO2)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. All Cu–O bond lengths are 1.86 Å. In the second Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.85 Å) and two longer (1.87 Å) Cu–O bond length. Zn2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Zn–O bond distances ranging from 2.16–2.44 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two Cu3+ and two equivalent Zn2+ atoms to form a mixture of distorted edge and corner-sharing OZn2Cu2 tetrahedra. In the second O2- site, O2- is bonded to two Cu3+ and two equivalent Zn2+ atoms to form a mixture of distorted edge and corner-sharing OZn2Cu2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(CuO2)2 by Materials Project

Zn(CuO2)2 is Spinel structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Cu3+ is bonded to six equivalent O2- atoms to form CuO6 octahedra that share corners with six equivalent ZnO4 tetrahedra and edges with six equivalent CuO6 octahedra. There are four shorter (2.01 Å) and two longer (2.02 Å) Cu–O bond lengths. Zn2+ is bonded to four equivalent O2- atoms to form ZnO4 tetrahedra that share corners with twelve equivalent CuO6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Zn–O bond lengths are 1.97 Å. O2- is bonded to three equivalent Cu3+ and one Zn2+ atom to form a mixture of distorted edge and corner-sharing OZnCu3 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca3(CuO3)2 by Materials Project

Ca3Cu2O6 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ca–O bond distances ranging from 2.29–2.57 Å. In the second Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ca–O bond distances ranging from 2.21–2.61 Å. In the third Ca2+ site, Ca2+ is bonded to seven O2- atoms to form distorted edge-sharing CaO7 hexagonal pyramids. There are a spread of Ca–O bond distances ranging from 2.36–2.50 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.82–1.95 Å. In the second Cu3+ site, Cu3+ is bonded in a square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.82–1.89 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to three Ca2+ and two equivalent Cu3+ atoms to form distorted OCa3Cu2 trigonal bipyramids that share a cornercorner with one OCa5Cu octahedra, corners with four equivalent OCa4Cu square pyramids, corners with three OCa3Cu2 trigonal bipyramids, an edgeedge with one OCa3Cu2 trigonal bipyramid, and faces with two equivalent OCa5Cu octahedra. The corner-sharing octahedral tilt angles are 39°. In the second O2- site, O2- is bonded to three Ca2+ and two equivalent Cu3+ atoms to form distorted OCa3Cu2 trigonal bipyramids that share corners with five equivalent OCa5Cu octahedra, corners with three OCa3Cu2 trigonal bipyramids, an edgeedge with one OCa3Cu2 trigonal bipyramid, and faces with two equivalent OCa4Cu square pyramids. The corner-sharing octahedra tilt angles range from 39–64°. In the third O2- site, O2- is bonded to four Ca2+ and one Cu3+ atom to form distorted OCa4Cu square pyramids that share corners with four equivalent OCa5Cu octahedra, corners with four equivalent OCa3Cu2 trigonal bipyramids, edges with two equivalent OCa5Cu octahedra, edges with two equivalent OCa4Cu square pyramids, and faces with two equivalent OCa3Cu2 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 5–6°. In the fourth O2- site, O2- is bonded to five Ca2+ and one Cu3+ atom to form distorted OCa5Cu octahedra that share corners with four equivalent OCa4Cu square pyramids, corners with six OCa3Cu2 trigonal bipyramids, edges with two equivalent OCa5Cu octahedra, edges with two equivalent OCa4Cu square pyramids, and faces with two equivalent OCa3Cu2 trigonal bipyramids. In the fifth O2- site, O2- is bonded in a distorted see-saw-like geometry to three Ca2+ and one Cu3+ atom. In the sixth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ca2+ and one Cu3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(CuO2)2 by Materials Project

MgCu2O4 is Spinel structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with twelve CuO6 octahedra. The corner-sharing octahedra tilt angles range from 55–62°. There is one shorter (1.98 Å) and three longer (1.99 Å) Mg–O bond length. There are four inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent MgO4 tetrahedra and edges with six CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.96–2.04 Å. In the second Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent MgO4 tetrahedra and edges with six CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.97–2.03 Å. In the third Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent MgO4 tetrahedra and edges with six CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.94–2.14 Å. In the fourth Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent MgO4 tetrahedra and edges with six CuO6 octahedra. There are two shorter (2.00 Å) and four longer (2.02 Å) Cu–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to one Mg2+ and three Cu3+ atoms to form distorted corner-sharing OMgCu3 trigonal pyramids. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Cu3+ atoms. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Cu3+ atoms. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Mg2+ and three Cu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KCu3(AsO5)2 by Materials Project

KCu3(AsO5)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. K1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.25 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four equivalent AsO4 tetrahedra and edges with four equivalent CuO6 octahedra. There are two shorter (1.88 Å) and four longer (2.19 Å) Cu–O bond lengths. In the second Cu3+ site, Cu3+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with four equivalent AsO4 tetrahedra and edges with four CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.84–2.47 Å. As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with six CuO6 octahedra. The corner-sharing octahedra tilt angles range from 53–54°. There are a spread of As–O bond distances ranging from 1.69–1.78 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, two equivalent Cu3+, and one As5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to two equivalent K1+ and one As5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one K1+, two Cu3+, and one As5+ atom. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to three Cu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2024

Sterically Encumbered Aryl Isocyanides Extend Excited-State Lifetimes and Improve the Photocatalytic Performance of Three-Coordinate Copper(I) β-Diketiminate Charge-Transfer Chromophores

Copper(I) complexes are prominent candidates to replace noble metal-based photosensitizers. We recently introduced a three-coordinate design for copper(I) charge-transfer chromophores that pair β-diketiminate ligands with aryl isocyanides. The excited-state lifetime in these compounds can be extended using a bichromophoric “triplet reservoir” strategy, which comes at the expense of a decrease in excited-state energy and reducing power. In this work, we introduce a complementary, sterically driven strategy for increasing the excited-state lifetimes of these photosensitizers, which gives a higher-energy, more strongly reducing charge-transfer triplet state than does the bichromophore approach. The compounds presented (Cu1–Cu4) have the general formula Cu(CyNacNac Me )(CN-Ar), where CyNacNac Me is a cyclohexyl-substituted β-diketiminate and CN-Ar is an aryl isocyanide with a variable steric profile. Their structural features and electrochemical and photophysical properties are described. The complexes with sterically encumbered 2,6-diisopropylphenyl or m-terphenyl isocyanide ligands (Cu2–Cu4) exhibit prolonged excited-state lifetimes relative to those of the parent 2,6-dimethylphenyl isocyanide compound Cu1. Specifically, one of the m-terphenyl isocyanide compounds, Cu3, displays an excited-state lifetime of 276 ns, approximately 30 times longer than that of Cu1 (9.3 ns). The photoluminescence quantum yield of Cu3 (0.09) also increases by two orders of magnitude compared to that of Cu1 (0.0008). Furthermore, the strong excited-state reducing power (*E ox = –2.4 V vs Fc +/0 ) and long lifetime of Cu3 lead to higher yields in photoredox and photocatalytic isomerization reactions, which include dehalogenation and/or hydrodgenation of benzophenone substrates, C–O bond activation of a lignin model substrate, and photocatalytic E/Z isomerization of stilbene.

14 SOLAR ENERGY↗
DOE OSTI2020

Materials Data on CaCu2(As2O7)2 by Materials Project

CaCu2(As2O7)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.27–2.97 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to five O2- atoms to form distorted CuO5 trigonal bipyramids that share corners with five AsO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.83–2.44 Å. In the second Cu3+ site, Cu3+ is bonded to five O2- atoms to form distorted CuO5 square pyramids that share corners with five AsO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.84–2.43 Å. There are four inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one AsO4 tetrahedra and corners with two equivalent CuO5 trigonal bipyramids. There are a spread of As–O bond distances ranging from 1.66–1.80 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CuO5 square pyramids and a cornercorner with one AsO4 tetrahedra. There are a spread of As–O bond distances ranging from 1.65–1.81 Å. In the third As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one CuO5 square pyramid, a cornercorner with one AsO4 tetrahedra, and corners with two equivalent CuO5 trigonal bipyramids. There are a spread of As–O bond distances ranging from 1.67–1.77 Å. In the fourth As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CuO5 square pyramids, a cornercorner with one AsO4 tetrahedra, and a cornercorner with one CuO5 trigonal bipyramid. There are a spread of As–O bond distances ranging from 1.67–1.79 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Cu3+, and one As5+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cu3+ and one As5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ca2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ca2+ and one As5+ atom. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to two As5+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two As5+ atoms. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ca2+, one Cu3+, and one As5+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twelfth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Cu3+, and one As5+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Ca2+, one Cu3+, and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cr3(CuO6)2 by Materials Project

Cr3(CuO6)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Cr6+ sites. In the first Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four CuO6 octahedra. The corner-sharing octahedra tilt angles range from 23–45°. There are a spread of Cr–O bond distances ranging from 1.66–1.68 Å. In the second Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four CuO6 octahedra. The corner-sharing octahedra tilt angles range from 21–45°. There are a spread of Cr–O bond distances ranging from 1.66–1.68 Å. In the third Cr6+ site, Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with four CuO6 octahedra. The corner-sharing octahedra tilt angles range from 38–46°. There are a spread of Cr–O bond distances ranging from 1.66–1.68 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six CrO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.96–2.05 Å. In the second Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six CrO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.95–2.00 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cr6+ and one Cu3+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cr6+ and one Cu3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zn(CuO2)2 by Materials Project

Zn(CuO2)2 is Spinel structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent ZnO4 tetrahedra and edges with six CuO6 octahedra. There are four shorter (1.99 Å) and two longer (2.04 Å) Cu–O bond lengths. In the second Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent ZnO4 tetrahedra and edges with six CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.97–2.03 Å. In the third Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent ZnO4 tetrahedra and edges with six CuO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.95–2.09 Å. In the fourth Cu3+ site, Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent ZnO4 tetrahedra and edges with six CuO6 octahedra. There are two shorter (2.00 Å) and four longer (2.02 Å) Cu–O bond lengths. Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with twelve CuO6 octahedra. The corner-sharing octahedra tilt angles range from 56–60°. There is three shorter (1.98 Å) and one longer (1.99 Å) Zn–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three Cu3+ and one Zn2+ atom to form a mixture of distorted corner and edge-sharing OZnCu3 trigonal pyramids. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Cu3+ and one Zn2+ atom. In the third O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Cu3+ and one Zn2+ atom. In the fourth O2- site, O2- is bonded to three Cu3+ and one Zn2+ atom to form a mixture of distorted corner and edge-sharing OZnCu3 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca3Cu6(AsO4)8 by Materials Project

Ca3Cu6(AsO4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.22–2.86 Å. In the second Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six AsO4 tetrahedra and edges with two CuO5 trigonal bipyramids. There are a spread of Ca–O bond distances ranging from 2.30–2.48 Å. In the third Ca2+ site, Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with six AsO4 tetrahedra and edges with two CuO5 trigonal bipyramids. There are a spread of Ca–O bond distances ranging from 2.31–2.45 Å. There are six inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to five O2- atoms to form distorted CuO5 trigonal bipyramids that share corners with five AsO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.83–2.44 Å. In the second Cu3+ site, Cu3+ is bonded to five O2- atoms to form CuO5 trigonal bipyramids that share corners with five AsO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.82–2.15 Å. In the third Cu3+ site, Cu3+ is bonded to five O2- atoms to form CuO5 trigonal bipyramids that share corners with five AsO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.86–2.09 Å. In the fourth Cu3+ site, Cu3+ is bonded to five O2- atoms to form CuO5 trigonal bipyramids that share corners with five AsO4 tetrahedra and an edgeedge with one CaO6 octahedra. There are a spread of Cu–O bond distances ranging from 1.82–2.08 Å. In the fifth Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.90 Å. In the sixth Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.85–1.91 Å. There are eight inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CaO6 octahedra and corners with three CuO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 54–63°. There are a spread of As–O bond distances ranging from 1.69–1.75 Å. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with two CuO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 60°. There are a spread of As–O bond distances ranging from 1.64–1.81 Å. In the third As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with two CuO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 58°. There are a spread of As–O bond distances ranging from 1.65–1.80 Å. In the fourth As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with two CuO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. There are a spread of As–O bond distances ranging from 1.66–1.82 Å. In the fifth As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CaO6 octahedra and corners with three CuO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 54–60°. There are a spread of As–O bond distances ranging from 1.70–1.77 Å. In the sixth As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with two CuO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 56°. There are a spread of As–O bond distances ranging from 1.66–1.79 Å. In the seventh As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CaO6 octahedra and corners with three CuO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 51–59°. There are a spread of As–O bond distances ranging from 1.69–1.77 Å. In the eighth As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with two equivalent CaO6 octahedra and corners with three CuO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 54–62°. There are a spread of As–O bond distances ranging from 1.69–1.75 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one As5+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ca2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one As5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ca2+ and one As5+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the eleventh O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the twelfth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Cu3+ and one As5+ atom. In the fourteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ca2+ and one As5+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to two Ca2+, one Cu3+, and one As5+ atom. In the sixteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the seventeenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Cu3+ and one As5+ atom. In the eighteenth O2- site, O2- is bonded in a distorted water-like geometry to one Ca2+ and one As5+ atom. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to two Ca2+ and one As5+ atom. In the twentieth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the twenty-first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twenty-second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twenty-third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Cu3+ and one As5+ atom. In the twenty-sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the twenty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Cu3+, and one As5+ atom. In the twenty-eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Ca2+ and one As5+ atom. In the twenty-ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Cu3+, and one As5+ atom. In the thirtieth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom. In the thirty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, two Cu3+, and one As5+ atom. In the thirty-second O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaCo2(CuO4)2 by Materials Project

CaCo2(CuO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ca2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ca–O bond distances ranging from 2.29–2.45 Å. There are two inequivalent Co4+ sites. In the first Co4+ site, Co4+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with two equivalent CuO5 trigonal bipyramids. There are a spread of Co–O bond distances ranging from 1.69–1.79 Å. In the second Co4+ site, Co4+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with three equivalent CuO5 trigonal bipyramids. There are a spread of Co–O bond distances ranging from 1.78–1.86 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to five O2- atoms to form CuO5 trigonal bipyramids that share corners with five CoO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.92–2.10 Å. In the second Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.88–1.91 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ca2+, one Co4+, and one Cu3+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Co4+, and one Cu3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Co4+, and one Cu3+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Co4+ and one Cu3+ atom. In the fifth O2- site, O2- is bonded to two equivalent Ca2+, one Co4+, and one Cu3+ atom to form distorted edge-sharing OCa2CoCu tetrahedra. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ca2+, one Co4+, and one Cu3+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co4+ and one Cu3+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co4+ and two Cu3+ atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1987

A theoretical study of the excited states of Ag3

Recently there was considerable interest in the properties and reactivities of small metal clusters. However, for the transition metal trimers, gas phase spectroscopy exists only for Cu3. Calculations are reported for the excited states of the Ag3 molecule. The excitation energies, geometries, derived harmonic frequencies, and transition moments are presented. The electronic structure of these states is very similar to the analogous states of Cu3. From the VCI wave functions transition moments were calculated between each of the Rydberg excited states and the ground state for an equilateral triangle geometry with R sub Ag-Ag = 5.3 a sub 0. One state was computed for the configuration 4d29 5sa sup prime 2 sub 1 5se sup prime 1 sub x 5se sup prime 1 sub y. This configuration was considered since the corresponding configuration for Cu3 is low-lying. Calculations were carried out for a quartet wavefunction in which the 4d hole was localized on the central Ag atom. The spectrum for Ag3 is expected to be simpler than for Cu3 since the 5s2 4d9 states are shifted to higher energy.

Walch, Stephen P.↗
DOE OSTI2020

Materials Data on Li6Fe3Cu(PO4)6 by Materials Project

Li6Fe3Cu(PO4)6 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 in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.05–2.44 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 2.10–2.48 Å. In the third 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 2.02–2.51 Å. In the fourth 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 2.06–2.79 Å. In the fifth 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 2.09–2.82 Å. In the sixth Li1+ site, Li1+ is bonded in a 5-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.84 Å. There are three inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.94–2.08 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.93–2.05 Å. In the third Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.94–2.12 Å. Cu3+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.97–2.11 Å. There are six inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 26–45°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 27–45°. There is two shorter (1.54 Å) and two longer (1.56 Å) P–O bond length. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 27–46°. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 25–48°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. In the fifth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 18–46°. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. In the sixth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one CuO6 octahedra and corners with three FeO6 octahedra. The corner-sharing octahedra tilt angles range from 18–48°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two Li1+, one Fe3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Cu3+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one Fe3+, and one P5+ atom. In the ninth O2- site, O2- is bonded to two Li1+, one Fe3+, and one P5+ atom to form distorted edge-sharing OLi2FeP trigonal pyramids. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the eleventh O2- site, O2- is bonded to three Li1+, one Cu3+, and one P5+ atom to form distorted OLi3CuP trigonal bipyramids that share a cornercorner with one OLi2FeP trigonal pyramid and a faceface with one OLi3CuP trigonal bipyramid. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Cu3+, and one P5+ atom. In the fourteenth O2- site, O2- is bonded to two Li1+, one Fe3+, and one P5+ atom to form distorted OLi2FeP trigonal pyramids that share corners with two OLi3CuP trigonal bipyramids and an edgeedge with one OLi2FeP trigonal pyramid. In the fifteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Cu3+, and one P5+ atom. In the sixteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Li1+, one Fe3+, and one P5+ atom. In the seventeenth O2- site, O2- is bonded in a 4-coordinate geometry to three Li1+, one Fe3+, and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a 5-coordinate geometry to three Li1+, one Cu3+, and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the twentieth O2- site, O2- is bonded in a 4-coordinate geometry to three Li1+, one Fe3+, and one P5+ atom. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the twenty-second O2- site, O2- is bonded to three Li1+, one Cu3+, and one P5+ atom to form distorted OLi3CuP trigonal bipyramids that share a cornercorner with one OLi2FeP trigonal pyramid and a faceface with one OLi3CuP trigonal bipyramid. In the twenty-third O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Fe3+, and one P5+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Li1+, one Fe3+, and one P5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(CuO2)2 by Materials Project

MgCu2O4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Mg–O bond distances ranging from 2.19–2.38 Å. In the second Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Mg–O bond distances ranging from 2.18–2.42 Å. In the third Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Mg–O bond distances ranging from 2.19–2.43 Å. In the fourth Mg2+ site, Mg2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Mg–O bond distances ranging from 2.20–2.40 Å. There are eight inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–63°. There are a spread of Cu–O bond distances ranging from 1.94–2.06 Å. In the second Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–62°. There are a spread of Cu–O bond distances ranging from 1.94–2.05 Å. In the third Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–63°. There are a spread of Cu–O bond distances ranging from 1.94–2.06 Å. In the fourth Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–64°. There are a spread of Cu–O bond distances ranging from 1.94–2.06 Å. In the fifth Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–63°. There are a spread of Cu–O bond distances ranging from 1.89–2.07 Å. In the sixth Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–62°. There are a spread of Cu–O bond distances ranging from 1.89–2.06 Å. In the seventh Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–63°. There are a spread of Cu–O bond distances ranging from 1.89–2.06 Å. In the eighth Cu3+ site, Cu3+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing CuO6 octahedra. The corner-sharing octahedra tilt angles range from 48–64°. There are a spread of Cu–O bond distances ranging from 1.90–2.07 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 trigonal bipyramids. In the second O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 trigonal bipyramids. In the third O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 trigonal bipyramids. In the fourth O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 trigonal bipyramids. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three Cu3+ atoms. In the sixth O2- site, O2- is bonded to two Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 trigonal bipyramids. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three Cu3+ atoms. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to two Mg2+ and three Cu3+ atoms. In the ninth O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 square pyramids. In the tenth O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 square pyramids. In the eleventh O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 square pyramids. In the twelfth O2- site, O2- is bonded to two equivalent Mg2+ and three Cu3+ atoms to form a mixture of distorted edge and corner-sharing OMg2Cu3 square pyramids. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Mg2+ and three Cu3+ atoms. In the fourteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Mg2+ and three Cu3+ atoms. In the fifteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Mg2+ and three Cu3+ atoms. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Mg2+ and three Cu3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca5Cu2(RhO6)2 by Materials Project

Ca5Cu2(RhO6)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are five inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.29–2.73 Å. In the second Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.32–2.97 Å. In the third Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.31–2.83 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.30–2.84 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.77 Å. There are two inequivalent Rh4+ sites. In the first Rh4+ site, Rh4+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Rh–O bond distances ranging from 1.99–2.06 Å. In the second Rh4+ site, Rh4+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Rh–O bond distances ranging from 1.95–2.06 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.88–1.91 Å. In the second Cu3+ site, Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.86–1.92 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Ca2+ and one Rh4+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom. In the third O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Ca2+ and one Rh4+ atom. In the fourth O2- site, O2- is bonded to four Ca2+ and one Rh4+ atom to form distorted edge-sharing OCa4Rh square pyramids. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom. In the seventh O2- site, O2- is bonded in a 6-coordinate geometry to four Ca2+, one Rh4+, and one Cu3+ atom. In the eighth O2- site, O2- is bonded to four Ca2+ and one Rh4+ atom to form distorted edge-sharing OCa4Rh square pyramids. In the ninth O2- site, O2- is bonded in a 5-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom. In the tenth O2- site, O2- is bonded in a 6-coordinate geometry to four Ca2+, one Rh4+, and one Cu3+ atom. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to three Ca2+, one Rh4+, and one Cu3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca(CuSi)2 by Materials Project

CaCu2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ca2+ is bonded to eight equivalent Si4- atoms to form CaSi8 hexagonal bipyramids that share corners with sixteen equivalent CuSi4 tetrahedra, edges with four equivalent CaSi8 hexagonal bipyramids, edges with eight equivalent CuSi4 tetrahedra, and faces with four equivalent CaSi8 hexagonal bipyramids. All Ca–Si bond lengths are 3.10 Å. Cu3+ is bonded to four equivalent Si4- atoms to form CuSi4 tetrahedra that share corners with eight equivalent CaSi8 hexagonal bipyramids, corners with four equivalent CuSi4 tetrahedra, edges with four equivalent CaSi8 hexagonal bipyramids, and edges with four equivalent CuSi4 tetrahedra. All Cu–Si bond lengths are 2.41 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Ca2+, four equivalent Cu3+, and one Si4- atom. The Si–Si bond length is 2.37 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FeCu(PO4)2 by Materials Project

FeCu(PO4)2 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Fe3+ is bonded to six O2- atoms to form distorted FeO6 octahedra that share corners with four PO4 tetrahedra and an edgeedge with one PO4 tetrahedra. There are a spread of Fe–O bond distances ranging from 1.97–2.19 Å. Cu3+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.83–1.91 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent FeO6 octahedra. The corner-sharing octahedra tilt angles range from 37–51°. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one FeO6 octahedra and an edgeedge with one FeO6 octahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of P–O bond distances ranging from 1.51–1.59 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Fe3+, one Cu3+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Fe3+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu3+ and one P5+ atom.

36 MATERIALS SCIENCE↗