Search NASA⌕ Search

SEARCH · Search NASA

Results for “Group 8”

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 127 records · Page 7
All sourcesNASA NTRSDOE OSTI
DOE OSTI2021

Iridate Li8IrO 6 : An Antiferromagnetic Insulator

In this work, a polycrystalline iridate Li 8 IrO 6 material was prepared via heating Li 2 O and IrO 2 starting materials in a sealed quartz tube at 650 °C for 48 h. The structure was determined from Rietveld refinement of room-temperature powder neutron diffraction data. Li 8 IrO 6 adopts the nonpolar space group $R\bar{3}$ with Li atoms occupying the tetrahedral and octahedral sites, which is supported by the electron diffraction and solid-state 7Li NMR. This results in a crystal structure consisting of LiO 4 tetrahedral layers alternating with mixed IrO 6 and LiO 6 octahedral layers along the crystallographic c -axis. The +4 oxidation state of Ir 4+ was confirmed by near-edge X-ray absorption spectroscopy. An in situ synchrotron X-ray diffraction study of Li 8 IrO 6 indicates that the sample is stable up to 1000 °C and exhibits no structural transitions. Magnetic measurements suggest long-range antiferromagnetic ordering with a Néel temperature (TN) of 4 K, which is corroborated by heat capacity measurements. The localized effective moment $μ_{\text{eff}}$ (Ir) = 1.73 $μ_{\text{B}}$ and insulating character indicate that Li 8 IrO 6 is a correlated insulator. First-principles calculations support the nonpolar crystal structure and reveal the insulating behavior both in paramagnetic and antiferromagnetic states.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2Ca29ZrSi16(O7F2)8 by Materials Project

Na2Ca29ZrSi16(O7F2)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a 6-coordinate geometry to three O and three F atoms. There are a spread of Na–O bond distances ranging from 2.35–2.55 Å. There are a spread of Na–F bond distances ranging from 2.28–2.57 Å. In the second Na site, Na is bonded in a 8-coordinate geometry to five O and three F atoms. There are a spread of Na–O bond distances ranging from 2.42–2.81 Å. There are a spread of Na–F bond distances ranging from 2.39–2.64 Å. There are twenty-nine inequivalent Ca sites. In the first Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.33–2.66 Å. The Ca–F bond length is 2.44 Å. In the second Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.27–2.68 Å. The Ca–F bond length is 2.30 Å. In the third Ca site, Ca is bonded in a 4-coordinate geometry to four O and one F atom. There are a spread of Ca–O bond distances ranging from 2.25–2.74 Å. The Ca–F bond length is 2.27 Å. In the fourth Ca site, Ca is bonded in a 5-coordinate geometry to two O and three F atoms. There are one shorter (2.35 Å) and one longer (2.66 Å) Ca–O bond lengths. There are a spread of Ca–F bond distances ranging from 2.16–2.37 Å. In the fifth Ca site, Ca is bonded in a 7-coordinate geometry to four O and three F atoms. There are a spread of Ca–O bond distances ranging from 2.42–2.53 Å. There are a spread of Ca–F bond distances ranging from 2.37–2.61 Å. In the sixth Ca site, Ca is bonded in a 5-coordinate geometry to two O and three F atoms. There are one shorter (2.32 Å) and one longer (2.39 Å) Ca–O bond lengths. There are a spread of Ca–F bond distances ranging from 2.23–2.27 Å. In the seventh Ca site, Ca is bonded in a 8-coordinate geometry to one Si, six O, and one F atom. The Ca–Si bond length is 2.98 Å. There are a spread of Ca–O bond distances ranging from 2.39–3.10 Å. The Ca–F bond length is 2.85 Å. In the eighth Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.31–2.62 Å. The Ca–F bond length is 2.45 Å. In the ninth Ca site, Ca is bonded in a 4-coordinate geometry to four O and one F atom. There are a spread of Ca–O bond distances ranging from 2.31–2.84 Å. The Ca–F bond length is 2.22 Å. In the tenth Ca site, Ca is bonded in a 7-coordinate geometry to five O and two F atoms. There are a spread of Ca–O bond distances ranging from 2.25–2.97 Å. There are one shorter (2.40 Å) and one longer (2.67 Å) Ca–F bond lengths. In the eleventh Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.36–2.63 Å. The Ca–F bond length is 2.31 Å. In the twelfth Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.34–2.56 Å. The Ca–F bond length is 2.30 Å. In the thirteenth Ca site, Ca is bonded in a 5-coordinate geometry to four O and two F atoms. There are a spread of Ca–O bond distances ranging from 2.21–2.66 Å. There are one shorter (2.29 Å) and one longer (2.44 Å) Ca–F bond lengths. In the fourteenth Ca site, Ca is bonded in a 6-coordinate geometry to three O and three F atoms. There are two shorter (2.35 Å) and one longer (2.50 Å) Ca–O bond lengths. There are a spread of Ca–F bond distances ranging from 2.25–2.84 Å. In the fifteenth Ca site, Ca is bonded in a 5-coordinate geometry to two O and three F atoms. There are one shorter (2.21 Å) and one longer (2.34 Å) Ca–O bond lengths. There are a spread of Ca–F bond distances ranging from 2.13–2.28 Å. In the sixteenth Ca site, Ca is bonded in a 7-coordinate geometry to one Si, four O, and two F atoms. The Ca–Si bond length is 2.87 Å. There are a spread of Ca–O bond distances ranging from 2.25–2.71 Å. There are one shorter (2.29 Å) and one longer (2.37 Å) Ca–F bond lengths. In the seventeenth Ca site, Ca is bonded in a 7-coordinate geometry to six O and one F atom. There are a spread of Ca–O bond distances ranging from 2.36–2.71 Å. The Ca–F bond length is 2.63 Å. In the eighteenth Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.31–2.85 Å. The Ca–F bond length is 2.17 Å. In the nineteenth Ca site, Ca is bonded to three O and three F atoms to form distorted CaO3F3 pentagonal pyramids that share corners with two SiO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.27–2.53 Å. There are a spread of Ca–F bond distances ranging from 2.24–2.52 Å. In the twentieth Ca site, Ca is bonded in a 5-coordinate geometry to three O and two F atoms. There are a spread of Ca–O bond distances ranging from 2.30–2.49 Å. There are one shorter (2.39 Å) and one longer (2.40 Å) Ca–F bond lengths. In the twenty-first Ca site, Ca is bonded in a 5-coordinate geometry to four O and one F atom. There are a spread of Ca–O bond distances ranging from 2.34–2.47 Å. The Ca–F bond length is 2.44 Å. In the twenty-second Ca site, Ca is bonded in a 5-coordinate geometry to four O and one F atom. There are a spread of Ca–O bond distances ranging from 2.20–2.51 Å. The Ca–F bond length is 2.38 Å. In the twenty-third Ca site, Ca is bonded in a 7-coordinate geometry to one Si, five O, and one F atom. The Ca–Si bond length is 2.86 Å. There are a spread of Ca–O bond distances ranging from 2.34–2.79 Å. The Ca–F bond length is 2.75 Å. In the twenty-fourth Ca site, Ca is bonded in a 4-coordinate geometry to three O and two F atoms. There are a spread of Ca–O bond distances ranging from 2.31–3.11 Å. There are one shorter (2.21 Å) and one longer (2.35 Å) Ca–F bond lengths. In the twenty-fifth Ca site, Ca is bonded in a 5-coordinate geometry to four O and one F atom. There are a spread of Ca–O bond distances ranging from 2.30–2.58 Å. The Ca–F bond length is 2.22 Å. In the twenty-sixth Ca site, Ca is bonded in a 5-coordinate geometry to two O and three F atoms. There are one shorter (2.36 Å) and one longer (2.52 Å) Ca–O bond lengths. There are a spread of Ca–F bond distances ranging from 2.27–2.30 Å. In the twenty-seventh Ca site, Ca is bonded in a 6-coordinate geometry to three O and three F atoms. There are a spread of Ca–O bond distances ranging from 2.25–2.61 Å. There are a spread of Ca–F bond distances ranging from 2.25–2.60 Å. In the twenty-eighth Ca site, Ca is bonded in a 6-coordinate geometry to five O and one F atom. There are a spread of Ca–O bond distances ranging from 2.41–2.72 Å. The Ca–F bond length is 2.26 Å. In the twenty-ninth Ca site, Ca is bonded in a 7-coordinate geometry to six O and one F atom. There are a spread of Ca–O bond distances ranging from 2.31–3.03 Å. The Ca–F bond length is 2.42 Å. Zr is bonded to six O and one F atom to form distorted ZrO6F pentagonal bipyramids that share corners with two SiO4 tetrahedra and an edgeedge with one SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.07–2.26 Å. The Zr–F bond length is 2.18 Å. There are sixteen inequivalent Si sites. In the first Si site, Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the second Si site, Si is bonded in a distorted trigonal non-coplanar geometry to one Ca and three O atoms. There are a spread of Si–O bond distances ranging from 1.64–1.80 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share an edgeedge with one ZrO6F pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the fourth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.74 Å. In the fifth Si site, Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.62–1.69 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6F pentagonal bipyramid, a cornercorner with one CaO3F3 pentagonal pyramid, and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.75 Å. In the seventh Si site, Si is bonded in a distorted trigonal non-coplanar geometry to one Ca and three O atoms. There are a spread of Si–O bond distances ranging from 1.65–1.75 Å. In the eighth Si site, Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.61–1.71 Å. In the ninth Si site, Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.61–1.71 Å. In the tenth Si site, Si is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There are a spread of Si–O bond distances ranging from 1.64–1.78 Å. In the eleventh Si site, Si is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There are a spread of Si–O bond distances ranging from 1.64–1.83 Å. In the twelfth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.63–1.71 Å. In the thirteenth Si site, Si is bonded in a 3-coordinate geometry to two O and one F atom. There is one shorter (1.64 Å) and one longer (1.69 Å) Si–O bond length. The Si–F bond length is 1.88 Å. In the fourteenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one ZrO6F pentagonal bipyramid, a cornercorner with one CaO3F3 pentagonal pyramid, and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.70 Å. In the fifteenth Si site, Si is bonded in a distorted trigonal non-coplanar geometry to one Ca and three O atoms. There are a spread of Si–O bond distances ranging from 1.64–1.80 Å. In the sixteenth Si site, Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.60–1.70 Å. There are fifty-six inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two Ca and one Si atom. In the second O site, O is bonded in a 3-coordinate geometry to two Ca and one Si atom. In the third O site, O is bonded in a 5-coordinate geometry to four Ca and one O atom. The O–O bond length is 1.52 Å. In the fourth O site, O is bonded in a 1-coordinate geometry to three Ca and one Si atom. In the fifth O site, O is bonded in a 1-coordinate geometry to one Ca, one Si, and one O atom. In the sixth O site, O is bonded in a 1-coordinate geometry to two Ca and one Si atom. In the seventh O site, O is bonded to one Na, two Ca, and one Si atom to form distorted ONaCa2Si trigonal pyramids that share a cornercorner with one OCa3O tetrahedra, a cornercorner with one FCa4 tetrahedra, an edgeedge with one ONaCaZrSi tetrahedra, and edges with two FNaCa3 tetrahedra. In the eighth O site, O is bonded to three Ca and one Si atom to form distorted OCa3Si tetrahedra that share corners with three FNaCa3 tetrahedra and an edgeedge with one OCa3Si tetrahedra. In the ninth O site, O is bonded in a 1-coordinate geometry to three Ca and one Si atom. In the tenth O site, O is bonded in a distorted trigonal planar geometry to three Ca and one Si atom. In the eleventh O site, O is bonded in a 4-coordinate geometry to three Ca and one Si atom. In the twelfth O site, O is bonded in a 1-coordinate geometry to three Ca and one Si atom. In the thirteenth O site, O is bonded in a distorted bent 150 degrees geometry to two Ca and two Si atoms. In the fourteenth O site, O is bonded in a distorted trigonal planar geometry to two Ca and one Si atom. In the fifteenth O site, O is bonded in a 3-coordinate geometry to one Ca and two Si atoms. In the sixteenth O

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2Th3Mg(MoO4)8 by Materials Project

Rb2MgTh3(MoO4)8 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Rb1+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Rb–O bond distances ranging from 2.91–3.44 Å. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MoO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.07–2.16 Å. There are two inequivalent Th4+ sites. In the first Th4+ site, Th4+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Th–O bond distances ranging from 2.37–2.47 Å. In the second Th4+ site, Th4+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Th–O bond distances ranging from 2.35–2.54 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.79 Å) and two longer (1.80 Å) Mo–O bond length. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share a cornercorner with one MgO6 octahedra. The corner-sharing octahedral tilt angles are 15°. There are a spread of Mo–O bond distances ranging from 1.78–1.83 Å. In the third Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–1.82 Å. In the fourth Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent MgO6 octahedra. The corner-sharing octahedra tilt angles range from 13–36°. There are a spread of Mo–O bond distances ranging from 1.77–1.82 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Th4+ and one Mo6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Rb1+, one Th4+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Rb1+, one Th4+, and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+, one Mg2+, and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one Th4+, and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a distorted linear geometry to one Rb1+, one Mg2+, and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one Th4+, and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a linear geometry to one Mg2+ and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a linear geometry to one Th4+ and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one Th4+, and one Mo6+ atom. In the sixteenth O2- site, O2- is bonded in a single-bond geometry to one Rb1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2Th3Mg(MoO4)8 by Materials Project

K2MgTh3(MoO4)8 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. K1+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.82–3.45 Å. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MoO4 tetrahedra. There are two shorter (2.06 Å) and four longer (2.13 Å) Mg–O bond lengths. There are two inequivalent Th4+ sites. In the first Th4+ site, Th4+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Th–O bond distances ranging from 2.37–2.46 Å. In the second Th4+ site, Th4+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Th–O bond distances ranging from 2.35–2.54 Å. There are four inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.79 Å) and two longer (1.80 Å) Mo–O bond length. In the second Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share a cornercorner with one MgO6 octahedra. The corner-sharing octahedral tilt angles are 16°. There are a spread of Mo–O bond distances ranging from 1.77–1.83 Å. In the third Mo6+ site, Mo6+ is bonded to four O2- atoms to form MoO4 tetrahedra that share corners with two equivalent MgO6 octahedra. The corner-sharing octahedra tilt angles range from 14–38°. There are a spread of Mo–O bond distances ranging from 1.77–1.82 Å. In the fourth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.74–1.83 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Th4+, and one Mo6+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to one K1+, one Mg2+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Th4+, and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Th4+, and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a linear geometry to one Mg2+ and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Mg2+, and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Th4+, and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a linear geometry to one Th4+ and one Mo6+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Th4+, and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a linear geometry to one Th4+ and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Th4+ and one Mo6+ atom. In the sixteenth O2- site, O2- is bonded in a single-bond geometry to one K1+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Li3Y3(WO4)8 by Materials Project

Li3Ba2Y3(WO4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first 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 1.98–2.65 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 1.99–2.62 Å. In the third Li1+ site, Li1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Li–O bond distances ranging from 2.28–2.65 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.39 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.63–3.31 Å. There are three inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.28–2.53 Å. In the second Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.29–2.49 Å. In the third Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.30–2.55 Å. There are eight inequivalent W6+ sites. In the first W6+ site, W6+ is bonded in a distorted tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.81–1.86 Å. In the second W6+ site, W6+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of W–O bond distances ranging from 1.79–2.33 Å. In the third W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.81–1.85 Å. In the fourth W6+ site, W6+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of W–O bond distances ranging from 1.80–2.36 Å. In the fifth W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.80–1.84 Å. In the sixth W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.78–1.88 Å. In the seventh W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.82–1.84 Å. In the eighth W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.79–1.88 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Y3+, and one W6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one W6+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+, one Ba2+, and two W6+ atoms. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+, one Ba2+, and two W6+ atoms. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Y3+, and one W6+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one W6+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the fifteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the seventeenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the eighteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+, one Y3+, and one W6+ atom. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Y3+, and one W6+ atom. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Y3+, and one W6+ atom. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one W6+ atom. In the twenty-second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the twenty-third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Y3+, and one W6+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one W6+ atom. In the twenty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the twenty-sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the twenty-eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the thirtieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Y3+, and one W6+ atom. In the thirty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Y3+, and one W6+ atom. In the thirty-second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Y3+, and one W6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Li3Y3(MoO4)8 by Materials Project

Li3Ba2Y3(MoO4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three 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 1.99–2.59 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 1.98–2.63 Å. In the third Li1+ site, Li1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Li–O bond distances ranging from 2.37–2.64 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.62–3.38 Å. In the second Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.64–3.28 Å. There are three inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.29–2.53 Å. In the second Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.31–2.51 Å. In the third Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.31–2.54 Å. There are eight inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.78–1.82 Å. In the second Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.77–1.87 Å. In the third Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.79–1.83 Å. In the fourth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.77–1.87 Å. In the fifth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.80–1.83 Å. In the sixth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–1.87 Å. In the seventh Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.79–1.83 Å. In the eighth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–1.87 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Y3+, and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Y3+, and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Y3+ and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Y3+, and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Y3+, and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Y3+, and one Mo6+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Y3+, and one Mo6+ atom. In the sixteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Mo6+ atom. In the seventeenth O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Y3+, and one Mo6+ atom. In the eighteenth O2- site, O2- is bonded in a 3-coordinate geometry to two Y3+ and one Mo6+ atom. In the nineteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Y3+, and one Mo6+ atom. In the twentieth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Mo6+ atom. In the twenty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one Mo6+ atom. In the twenty-second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Mo6+ atom. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Y3+, and one Mo6+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Mo6+ atom. In the twenty-fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the thirtieth O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the thirty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the thirty-second O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+, one Ba2+, and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Li3Ho3(WO4)8 by Materials Project

Li3Ba2Ho3(WO4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three 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 1.97–2.54 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 1.98–2.50 Å. In the third Li1+ site, Li1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Li–O bond distances ranging from 2.29–2.64 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.65–3.33 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.63–3.26 Å. There are three inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.25–2.51 Å. In the second Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.29–2.45 Å. In the third Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.28–2.50 Å. There are eight inequivalent W6+ sites. In the first W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.82–1.84 Å. In the second W6+ site, W6+ is bonded to five O2- atoms to form distorted corner-sharing WO5 tetrahedra. There are a spread of W–O bond distances ranging from 1.79–2.40 Å. In the third W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.82–1.85 Å. In the fourth W6+ site, W6+ is bonded in a distorted tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.80–1.88 Å. In the fifth W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.81–1.87 Å. In the sixth W6+ site, W6+ is bonded to four O2- atoms to form distorted corner-sharing WO4 tetrahedra. There are a spread of W–O bond distances ranging from 1.80–1.89 Å. In the seventh W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.81–1.85 Å. In the eighth W6+ site, W6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of W–O bond distances ranging from 1.80–1.88 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Ho3+, and one W6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ho3+, and one W6+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the tenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one W6+ atom. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+, one Ho3+, and one W6+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Ho3+, and one W6+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one Ho3+, and one W6+ atom. In the seventeenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Ho3+, and one W6+ atom. In the eighteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ho3+, and one W6+ atom. In the twentieth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the twenty-first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Ho3+, and one W6+ atom. In the twenty-second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ho3+, and one W6+ atom. In the twenty-fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ho3+ and one W6+ atom. In the twenty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the twenty-sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Ho3+, and one W6+ atom. In the twenty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Ho3+, and one W6+ atom. In the twenty-eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one Ho3+, and one W6+ atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the thirtieth O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Ba2+, and two W6+ atoms. In the thirty-first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom. In the thirty-second O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Ba2+, and one W6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2Li3La3(MoO4)8 by Materials Project

Li3Ba2La3(MoO4)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three 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 1.99–2.53 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 2.00–2.50 Å. In the third Li1+ site, Li1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Li–O bond distances ranging from 2.44–2.68 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.20 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–3.37 Å. There are three inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.63 Å. In the second La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.47–2.59 Å. In the third La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.44–2.60 Å. There are eight inequivalent Mo6+ sites. In the first Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.79–1.82 Å. In the second Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.75–1.85 Å. In the third Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.80 Å) and one longer (1.82 Å) Mo–O bond length. In the fourth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.76–1.85 Å. In the fifth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.77–1.87 Å. In the sixth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.79–1.83 Å. In the seventh Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.77–1.86 Å. In the eighth Mo6+ site, Mo6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Mo–O bond distances ranging from 1.78–1.82 Å. There are thirty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one La3+, and one Mo6+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ba2+, one La3+, and one Mo6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one La3+, and one Mo6+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to two La3+ and one Mo6+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one La3+, and one Mo6+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two La3+ and one Mo6+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one La3+, and one Mo6+ atom. In the thirteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the seventeenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the eighteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the nineteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twentieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one Ba2+, and one Mo6+ atom. In the twenty-second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one La3+ and one Mo6+ atom. In the twenty-third O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one La3+, and one Mo6+ atom. In the twenty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Ba2+, one La3+, and one Mo6+ atom. In the twenty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one La3+, and one Mo6+ atom. In the twenty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to two La3+ and one Mo6+ atom. In the twenty-seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one La3+, and one Mo6+ atom. In the twenty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to two La3+ and one Mo6+ atom. In the twenty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one La3+, and one Mo6+ atom. In the thirtieth O2- site, O2- is bonded in a distorted trigonal planar geometry to two La3+ and one Mo6+ atom. In the thirty-first O2- site, O2- is bonded in a 1-coordinate geometry to one Li1+, one La3+, and one Mo6+ atom. In the thirty-second O2- site, O2- is bonded in a 3-coordinate geometry to two La3+ and one Mo6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CdRe2H16C4S4(NO)8 by Materials Project

Re2CdC4H16S4(NO)8 is beta Polonium structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two Re2CdC4H16S4(NO)8 clusters. Re7+ is bonded to four O2- atoms to form ReO4 tetrahedra that share a cornercorner with one CdS4O2 octahedra. The corner-sharing octahedral tilt angles are 38°. There is three shorter (1.75 Å) and one longer (1.77 Å) Re–O bond length. Cd2+ is bonded to four S2- and two equivalent O2- atoms to form CdS4O2 octahedra that share corners with two equivalent ReO4 tetrahedra. There are two shorter (2.67 Å) and two longer (2.74 Å) Cd–S bond lengths. Both Cd–O bond lengths are 2.43 Å. There are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a distorted trigonal planar geometry to two N3- and one S2- atom. Both C–N bond lengths are 1.34 Å. The C–S bond length is 1.72 Å. In the second C4+ site, C4+ is bonded in a distorted trigonal planar geometry to two N3- and one S2- atom. Both C–N bond lengths are 1.33 Å. The C–S bond length is 1.73 Å. There are four inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the second N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the third N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two equivalent H1+ atoms. Both N–H bond lengths are 1.02 Å. In the fourth N3- site, N3- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. There are seven inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to one Cd2+ and one C4+ atom. In the second S2- site, S2- is bonded in a distorted water-like geometry to one Cd2+ and one C4+ atom. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Re7+ and one Cd2+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Re7+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Re7+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Re7+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KNa2Tb(SiO3)8 by Materials Project

KNa2Tb(SiO3)8 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. K is bonded to six O atoms to form distorted KO6 octahedra that share corners with eight SiO4 tetrahedra. There are a spread of K–O bond distances ranging from 3.01–3.16 Å. There are two inequivalent Na sites. In the first Na site, Na is bonded to six O atoms to form distorted NaO6 octahedra that share corners with four SiO4 tetrahedra and edges with two TbO6 octahedra. There are a spread of Na–O bond distances ranging from 2.37–2.68 Å. In the second Na site, Na is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.44–2.88 Å. There are two inequivalent Tb sites. In the first Tb site, Tb is bonded to six O atoms to form TbO6 octahedra that share corners with six SiO4 tetrahedra and edges with two equivalent NaO6 octahedra. There are two shorter (2.25 Å) and four longer (2.29 Å) Tb–O bond lengths. In the second Tb site, Tb is bonded to six O atoms to form TbO6 octahedra that share corners with six SiO4 tetrahedra and edges with two equivalent NaO6 octahedra. There are four shorter (2.30 Å) and two longer (2.32 Å) Tb–O bond lengths. There are six inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one KO6 octahedra, a cornercorner with one NaO6 octahedra, a cornercorner with one TbO6 octahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 38–67°. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TbO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 29°. There is one shorter (1.61 Å) and three longer (1.64 Å) Si–O bond length. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one KO6 octahedra, a cornercorner with one NaO6 octahedra, a cornercorner with one TbO6 octahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–70°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent KO6 octahedra and corners with four SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 71°. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one TbO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 24°. There are a spread of Si–O bond distances ranging from 1.59–1.66 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two equivalent KO6 octahedra and corners with four SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 74°. There are a spread of Si–O bond distances ranging from 1.61–1.63 Å. There are fifteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the second O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the third O site, O is bonded in a bent 150 degrees geometry to one Tb and one Si atom. In the fourth O site, O is bonded in a linear geometry to two Si atoms. In the fifth O site, O is bonded in a 4-coordinate geometry to two Na, one Tb, and one Si atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the seventh O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eighth O site, O is bonded in a distorted bent 150 degrees geometry to one K and two Si atoms. In the ninth O site, O is bonded in a 4-coordinate geometry to two equivalent Na, one Tb, and one Si atom. In the tenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the eleventh O site, O is bonded in a 3-coordinate geometry to one Na, one Tb, and one Si atom. In the twelfth O site, O is bonded in a bent 150 degrees geometry to one Na and two Si atoms. In the thirteenth O site, O is bonded in a trigonal non-coplanar geometry to two Na and one O atom. The O–O bond length is 1.31 Å. In the fourteenth O site, O is bonded in a bent 120 degrees geometry to one K and one O atom. The O–O bond length is 1.24 Å. In the fifteenth O site, O is bonded in a bent 120 degrees geometry to two equivalent O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb(WO4)8 by Materials Project

Rb(WO4)8 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Rb is bonded in a distorted square co-planar geometry to four equivalent O atoms. All Rb–O bond lengths are 2.95 Å. There are two inequivalent W sites. In the first W site, W is bonded to six O atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedra tilt angles range from 0–16°. There are a spread of W–O bond distances ranging from 1.86–2.00 Å. In the second W site, W is bonded to six O atoms to form distorted corner-sharing WO6 octahedra. The corner-sharing octahedra tilt angles range from 8–19°. There are a spread of W–O bond distances ranging from 1.77–2.14 Å. There are eleven inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one W atom. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one Rb and one W atom. In the third O site, O is bonded in a distorted water-like geometry to two equivalent O atoms. Both O–O bond lengths are 2.06 Å. In the fourth O site, O is bonded in a linear geometry to two equivalent W atoms. In the fifth O site, O is bonded in a linear geometry to two equivalent W atoms. In the sixth O site, O is bonded in a bent 150 degrees geometry to two equivalent W atoms. In the seventh O site, O is bonded in a linear geometry to two equivalent W atoms. In the eighth O site, O is bonded in a single-bond geometry to one W and one O atom. In the ninth O site, O is bonded in a linear geometry to two equivalent W atoms. In the tenth O site, O is bonded in a linear geometry to two W atoms. In the eleventh O site, O is bonded in a linear geometry to two W atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La19(RuO6)8 by Materials Project

La19(RuO6)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are nineteen inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.83 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.38–3.11 Å. In the third La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.35–2.82 Å. In the fourth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.77 Å. In the fifth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.82 Å. In the sixth La3+ site, La3+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.38–3.03 Å. In the seventh La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.33–2.92 Å. In the eighth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.81 Å. In the ninth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.43–2.57 Å. In the tenth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.43–2.58 Å. In the eleventh La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.38–2.97 Å. In the twelfth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.32–2.92 Å. In the thirteenth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.35–2.61 Å. In the fourteenth La3+ site, La3+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.38–3.00 Å. In the fifteenth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.42–3.01 Å. In the sixteenth La3+ site, La3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.36–2.70 Å. In the seventeenth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.81 Å. In the eighteenth La3+ site, La3+ is bonded in a 9-coordinate geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.37–2.94 Å. In the nineteenth La3+ site, La3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of La–O bond distances ranging from 2.41–2.74 Å. There are eight inequivalent Ru+4.88+ sites. In the first Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.92–2.03 Å. In the second Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.95–2.01 Å. In the third Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.96–2.02 Å. In the fourth Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.98–2.05 Å. In the fifth Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.98–2.05 Å. In the sixth Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.94–2.06 Å. In the seventh Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.95–2.02 Å. In the eighth Ru+4.88+ site, Ru+4.88+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Ru–O bond distances ranging from 1.94–2.01 Å. There are forty-eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the third O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the fifth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form distorted corner-sharing OLa3Ru trigonal pyramids. In the sixth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru tetrahedra. In the seventh O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the eighth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two La3+ and one Ru+4.88+ atom. In the eleventh O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the twelfth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two La3+ and one Ru+4.88+ atom. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the sixteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the seventeenth O2- site, O2- is bonded in a distorted T-shaped geometry to two La3+ and one Ru+4.88+ atom. In the eighteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the nineteenth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twentieth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three La3+ and one Ru+4.88+ atom. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twenty-fifth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twenty-sixth O2- site, O2- is bonded in a 5-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the twenty-seventh O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the twenty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the twenty-ninth O2- site, O2- is bonded in a distorted see-saw-like geometry to three La3+ and one Ru+4.88+ atom. In the thirtieth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-first O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-second O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-third O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-fifth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-sixth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the thirty-seventh O2- site, O2- is bonded in a distorted T-shaped geometry to two La3+ and one Ru+4.88+ atom. In the thirty-eighth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the thirty-ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to two La3+ and one Ru+4.88+ atom. In the fortieth O2- site, O2- is bonded in a 3-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the forty-first O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom. In the forty-second O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the forty-third O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru tetrahedra. In the forty-fourth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru trigonal pyramids. In the forty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the forty-sixth O2- site, O2- is bonded to three La3+ and one Ru+4.88+ atom to form a mixture of distorted corner and edge-sharing OLa3Ru tetrahedra. In the forty-seventh O2- site, O2- is bonded in a 5-coordinate geometry to four La3+ and one Ru+4.88+ atom. In the forty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to three La3+ and one Ru+4.88+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Cubic Crystal Structure Formation and Optical Properties within the Ag–B II –M IV –X (B II = Sr, Pb; M IV = Si, Ge, Sn; X = S, Se) Family of Semiconductors

Quaternary chalcogenide semiconductors are promising materials for energy conversion and nonlinear optical applications, with properties tunable primarily by varying the elemental composition and crystal structure. Here, we first analyze the connections among several cubic crystal structure types, as well as the orthorhombic Ag 2 PbGeS 4 -type structure, reported for select members within the Ag–B II –M IV –X (B II = Sr, Pb; M IV = Si, Ge, Sn; X = S, Se) compositional space. Focusing on the Ag–Pb–Si–S and Ag–Sr–Sn–S systems, we show that one structure type, with the formulas Ag 2 Pb 3 Si 2 S 8 and Ag 2 Sr 3 Sn 2 S 8 , is favored. We have prepared powder and single-crystal samples of Ag 2 Pb 3 Si 2 S 8 and Ag 2 Sr 3 Sn 2 S 8 , showing that each takes on the noncentrosymmetric cubic space group I$\bar{43}$d and is isostructural to the previously reported compound Ag 2 Sr 3 Ge 2 Se 8 . Through hybrid density functional theory calculations, these cubic compounds are demonstrated to be (quasi-)direct band gap semiconductors with high densities of states at the band maxima. Furthermore, the band-gap energies are measured by reflectance spectroscopy as 1.95(3) and 2.66(4) eV for Ag 2 Pb 3 Si 2 S 8 and Ag 2 Sr 3 Sn 2 S 8 , respectively. We further measure the optical properties and show the electronic band structures of three other isostructural A I –B II –M IV –X-type materials, i.e., Ag 2 Sr 3 Si 2 S 8 , Ag 2 Sr 3 Ge 2 S 8 , and Ag 2 Sr 3 Ge 2 Se 8 , showing that the band gaps can be predictably tuned by element substitution. Detailed visual analyses of the different structures and of their relationships with other members of the Ag–B II –M IV –X compositional family provide a basis for a broader understanding of the structure formation and optoelectronic properties within the quaternary chalcogenide semiconductor family.

14 SOLAR ENERGY↗
DOE OSTI2020

Materials Data on Na4V10Co(H11O13)4 by Materials Project

Na4V10Co(H5O6)8(H2O)2O2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional and consists of two water molecules, two water molecules, and one Na4V10Co(H5O6)8 framework. In the Na4V10Co(H5O6)8 framework, there are three inequivalent Na sites. In the first Na site, Na is bonded to six O atoms to form distorted edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.34–2.72 Å. In the second Na site, Na is bonded to six O atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.43–2.46 Å. In the third Na site, Na is bonded to six O atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.35–2.47 Å. There are five inequivalent V sites. In the first V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.66–2.27 Å. In the second V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.63–2.38 Å. In the third V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.65–2.31 Å. In the fourth V site, V is bonded to six O atoms to form distorted edge-sharing VO6 octahedra. There are a spread of V–O bond distances ranging from 1.73–2.12 Å. In the fifth V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.66–2.38 Å. Co is bonded in an octahedral geometry to six O atoms. There are a spread of Co–O bond distances ranging from 2.02–2.07 Å. There are twenty inequivalent H sites. In the first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the second H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the third H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the fourth H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.00 Å) and one longer (1.73 Å) H–O bond length. In the fifth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the sixth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.00 Å. In the seventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eighth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the ninth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the tenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the eleventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the twelfth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 1.01 Å. In the thirteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the fourteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the fifteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the sixteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the seventeenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eighteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the nineteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the twentieth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. There are twenty-four inequivalent O sites. In the first O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the second O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the third O site, O is bonded in a distorted bent 120 degrees geometry to two V atoms. In the fourth O site, O is bonded in a trigonal non-coplanar geometry to three V atoms. In the fifth O site, O is bonded in a distorted water-like geometry to one Co and two H atoms. In the sixth O site, O is bonded in a single-bond geometry to one V atom. In the seventh O site, O is bonded in a distorted trigonal non-coplanar geometry to one Co and two H atoms. In the eighth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the ninth O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the tenth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the eleventh O site, O is bonded in a distorted single-bond geometry to one V atom. In the twelfth O site, O is bonded in a distorted trigonal planar geometry to two V and one H atom. In the thirteenth O site, O is bonded in a distorted bent 120 degrees geometry to two V atoms. In the fourteenth O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the fifteenth O site, O is bonded in a single-bond geometry to one V atom. In the sixteenth O site, O is bonded in a distorted water-like geometry to two V atoms. In the seventeenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the eighteenth O site, O is bonded in a distorted linear geometry to one Na and one V atom. In the nineteenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the twentieth O site, O is bonded to six V atoms to form edge-sharing OV6 octahedra. In the twenty-first O site, O is bonded in a trigonal non-coplanar geometry to three V atoms. In the twenty-second O site, O is bonded in a water-like geometry to two V atoms. In the twenty-third O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the twenty-fourth O site, O is bonded in a distorted water-like geometry to one Co and two H atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Crystal structures and rotational dynamics of a two-dimensional metal halide perovskite (OA) 2 PbI 4

The extended charge carrier lifetime in metal halide perovskites is responsible for their excellent optoelectronic properties. Recent studies indicate that the superb device performance in these materials is intimately related to the organic cation dynamics. Here, we focus on the investigation of the two-dimensional hybrid perovskite, (C 8 H 17 NH 3 ) 2 PbI 4 (henceforth, OA + = C 8 H 17 NH 3 + ). Using elastic and quasielastic neutron scattering techniques and group theoretical analysis, we studied the structural phase transitions and rotational modes of the C 8 H 17 NH 3 + cation in (OA) 2 PbI 4 . Here, our results show that, in the high-temperature orthorhombic ( T > 310 K) phase, the OA + cation exhibits a combination of a twofold rotation of the NH 3 –CH 2 head group about the crystal c -axis with a characteristic relaxation time of ~6.2 ps, threefold rotations (C 3 ) of NH 3 and CH 3 terminal groups, and slow librations of the other atoms. Contrastingly, only the C 3 rotation is present in the intermediate-temperature orthorhombic (238 K < T < 310 K) and low-temperature monoclinic ( T < 238 K) phases.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb2BaPt2(CN)8 by Materials Project

Rb2BaPt2(CN)8 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Rb1+ is bonded in a body-centered cubic geometry to eight equivalent N3- atoms. All Rb–N bond lengths are 3.36 Å. Ba2+ is bonded in a body-centered cubic geometry to eight equivalent N3- atoms. All Ba–N bond lengths are 2.92 Å. Pt2- is bonded in a rectangular see-saw-like geometry to four equivalent C3+ atoms. All Pt–C bond lengths are 1.99 Å. C3+ is bonded in a linear geometry to one Pt2- and one N3- atom. The C–N bond length is 1.18 Å. N3- is bonded in a distorted single-bond geometry to two equivalent Rb1+, one Ba2+, and one C3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Al3P8NO36 by Materials Project

(Al3(PO4)8)2N2(O2)4 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of four ammonia molecules; eight hydrogen peroxide molecules; and two Al3(PO4)8 sheets oriented in the (0, 0, 1) direction. In each Al3(PO4)8 sheet, there are two inequivalent Al sites. In the first Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with three PO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.85–1.98 Å. In the second Al site, Al is bonded to six O atoms to form AlO6 octahedra that share corners with two equivalent PO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.86–1.95 Å. There are four inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two AlO6 octahedra. The corner-sharing octahedra tilt angles range from 22–37°. There are a spread of P–O bond distances ranging from 1.52–1.60 Å. In the second P site, P is bonded in a trigonal planar geometry to three O atoms. There is one shorter (1.47 Å) and two longer (1.50 Å) P–O bond length. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent AlO6 octahedra. The corner-sharing octahedra tilt angles range from 20–31°. There is two shorter (1.53 Å) and two longer (1.55 Å) P–O bond length. In the fourth P site, P is bonded in a trigonal planar geometry to three O atoms. There is one shorter (1.48 Å) and two longer (1.49 Å) P–O bond length. There are sixteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one Al and one P atom. In the third O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.21 Å. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the sixth O site, O is bonded in a single-bond geometry to one P and one O atom. The O–O bond length is 1.88 Å. In the seventh O site, O is bonded in a single-bond geometry to one P atom. In the eighth O site, O is bonded in a distorted bent 120 degrees geometry to one Al and one P atom. In the ninth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the tenth O site, O is bonded in a water-like geometry to two O atoms. In the eleventh O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the twelfth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom. In the thirteenth O site, O is bonded in a single-bond geometry to one P atom. In the fourteenth O site, O is bonded in a single-bond geometry to one P atom. In the fifteenth O site, O is bonded in a single-bond geometry to one P atom. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to one Al and one P atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na20Zr11Si10(PO9)8 by Materials Project

Na20Zr11Si10(PO9)8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty inequivalent Na sites. In the first Na site, Na is bonded to four O atoms to form distorted NaO4 tetrahedra that share a cornercorner with one ZrO6 octahedra, a cornercorner with one PO4 tetrahedra, corners with three SiO4 tetrahedra, and an edgeedge with one ZrO6 octahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Na–O bond distances ranging from 2.25–2.46 Å. In the second Na site, Na is bonded in a 4-coordinate geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.18–2.91 Å. In the third Na site, Na is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.19–2.74 Å. In the fourth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.19–2.82 Å. In the fifth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.43–2.85 Å. In the sixth Na site, Na is bonded in a distorted trigonal non-coplanar geometry to three O atoms. There are a spread of Na–O bond distances ranging from 2.22–2.33 Å. In the seventh Na site, Na is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.47–2.95 Å. In the eighth Na site, Na is bonded in a 1-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.32–2.72 Å. In the ninth Na site, Na is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.45–2.79 Å. In the tenth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.44–2.86 Å. In the eleventh Na site, Na is bonded in a 4-coordinate geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.17–2.76 Å. In the twelfth Na site, Na is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.42–2.89 Å. In the thirteenth Na site, Na is bonded in a 4-coordinate geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.29–2.53 Å. In the fourteenth Na site, Na is bonded in a 6-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.41–2.66 Å. In the fifteenth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.38–2.83 Å. In the sixteenth Na site, Na is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Na–O bond distances ranging from 2.40–2.88 Å. In the seventeenth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.38–2.94 Å. In the eighteenth Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.42–2.99 Å. In the nineteenth Na site, Na is bonded in a distorted hexagonal planar geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.40–2.80 Å. In the twentieth Na site, Na is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Na–O bond distances ranging from 2.42–2.70 Å. There are eleven inequivalent Zr sites. In the first Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share a cornercorner with one NaO4 tetrahedra, corners with two PO4 tetrahedra, and corners with four SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.06–2.19 Å. In the second Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.01–2.21 Å. In the third Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.06–2.24 Å. In the fourth Zr site, Zr is bonded to six O atoms to form distorted ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 1.93–2.33 Å. In the fifth Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with two PO4 tetrahedra, corners with four SiO4 tetrahedra, and an edgeedge with one NaO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.05–2.23 Å. In the sixth Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.02–2.18 Å. In the seventh Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.06–2.22 Å. In the eighth Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 1.99–2.26 Å. In the ninth Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.01–2.24 Å. In the tenth Zr site, Zr is bonded to six O atoms to form distorted ZrO6 octahedra that share corners with two PO4 tetrahedra and corners with four SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.01–2.35 Å. In the eleventh Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with three SiO4 tetrahedra and corners with three PO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.03–2.27 Å. There are ten inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three ZrO6 octahedra and a cornercorner with one NaO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–42°. There are a spread of Si–O bond distances ranging from 1.59–1.71 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three ZrO6 octahedra and a cornercorner with one NaO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–50°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–41°. There are a spread of Si–O bond distances ranging from 1.59–1.66 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 21–43°. There is two shorter (1.64 Å) and two longer (1.65 Å) Si–O bond length. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with three ZrO6 octahedra and a cornercorner with one NaO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–41°. There are a spread of Si–O bond distances ranging from 1.57–1.71 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 20–43°. There is three shorter (1.64 Å) and one longer (1.65 Å) Si–O bond length. In the seventh Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 19–40°. There is one shorter (1.63 Å) and three longer (1.65 Å) Si–O bond length. In the eighth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 11–43°. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. In the ninth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 24–44°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. In the tenth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 25–49°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. There are eight inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three ZrO6 octahedra and a cornercorner with one NaO4 tetrahedra. The corner-sharing octahedra tilt angles range from 18–28°. There are a spread of P–O bond distances ranging from 1.51–1.58 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 10–46°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 17–36°. There is one shorter (1.54 Å) and three longer (1.56 Å) P–O bond length. In the fourth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 19–42°. There is three shorter (1.55 Å) and one longer (1.57 Å) P–O bond length. In the fifth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 16–41°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the sixth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 19–35°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the seventh P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 13–44°. There is three shorter (1.55 Å) and one longer (1.57 Å) P–O bond length. In the eighth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 23–37°. There is two shorter (1.54 Å) and two longer (1.56 Å) P–O bond length. There are seventy-two inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one Na, one Zr, and one Si atom. In the second O site, O is bonded in a 3-coordinate geometry to one Na, one Zr, and one Si atom. In the third O site, O is bonded in a 3-coordinate geometry to one Na, one Zr, and one Si atom. In the fourth O site, O is bonded in a 4-coordinate geometry to two Na, one Zr, and one Si atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one Zr and one P atom. In the sixth O site, O is bonded in a distorted trigonal planar geometry to one Na, one Zr, and one Si atom. In the seventh O site, O is bonded in a 3-coordinate geometry to three Na and one Si atom. In the eighth O site, O is bonded to four Na and one Si atom to form distorted edge-sharing ONa4Si trigonal bipyramids. In the ninth O site, O is bonded in a 3-coordinate geometry to one Na, one Zr, and one Si atom. In the tenth O site, O is bonded in a distorted see-saw-like geometry to three Na and one Si atom. In the eleventh O site, O is bonded in a 4-coordinate geometry to two Na, one Zr, and one Si atom. In the twelfth O site, O is bonded in a 4-coordinate geometry to two Na, one Zr, and one

36 MATERIALS SCIENCE↗