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DOE OSTI2020

Materials Data on Ba3NaNd3(Si3O10)2 by Materials Project

NaBa3Nd3(Si3O10)2 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.42–2.86 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.65–3.04 Å. In the second Ba2+ site, Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.68–2.90 Å. There are two inequivalent Nd3+ sites. In the first Nd3+ site, Nd3+ is bonded to seven O2- atoms to form distorted NdO7 pentagonal bipyramids that share corners with three SiO4 tetrahedra and edges with two SiO4 tetrahedra. There are a spread of Nd–O bond distances ranging from 2.34–2.62 Å. In the second Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.37–2.68 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one NdO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one NdO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one NdO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one NdO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent NdO7 pentagonal bipyramids and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.71 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two Nd3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two Nd3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+, one Nd3+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, two equivalent Ba2+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two Nd3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ba2+ and two Si4+ atoms. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Nd3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to two Ba2+, one Nd3+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Ba2+, one Nd3+, and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+ and two equivalent Si4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li3Fe4(Si3O10)2 by Materials Project

Li3Fe4(Si3O10)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Li sites. In the first Li site, Li is bonded to four O atoms to form distorted LiO4 tetrahedra that share corners with four SiO4 tetrahedra, corners with three equivalent FeO5 trigonal bipyramids, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Li–O bond distances ranging from 1.93–2.27 Å. In the second Li site, Li is bonded in a distorted pentagonal planar geometry to five O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.40 Å. In the third Li site, Li is bonded to four O atoms to form distorted LiO4 tetrahedra that share corners with four SiO4 tetrahedra, corners with three equivalent FeO5 trigonal bipyramids, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Li–O bond distances ranging from 1.93–2.27 Å. There are four inequivalent Fe sites. In the first Fe site, Fe is bonded to five O atoms to form FeO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, an edgeedge with one LiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.90–2.22 Å. In the second Fe site, Fe is bonded to five O atoms to form FeO5 trigonal bipyramids that share corners with three equivalent LiO4 tetrahedra, corners with five SiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.90–2.11 Å. In the third Fe site, Fe is bonded to five O atoms to form FeO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, an edgeedge with one LiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.86–2.18 Å. In the fourth Fe site, Fe is bonded to five O atoms to form FeO5 trigonal bipyramids that share corners with three equivalent LiO4 tetrahedra, corners with five SiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.92–2.10 Å. There are six inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and corners with two FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one SiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one SiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.61–1.67 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with three equivalent LiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There is three shorter (1.64 Å) and one longer (1.69 Å) Si–O bond length. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with three equivalent LiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.64–1.68 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and corners with two FeO5 trigonal bipyramids. There is one shorter (1.63 Å) and three longer (1.64 Å) Si–O bond length. There are twenty inequivalent O sites. In the first O site, O is bonded in a distorted trigonal planar geometry to one Li, one Fe, and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Fe and one Si atom. In the third O site, O is bonded in a distorted trigonal planar geometry to one Li and two Si atoms. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Fe and one Si atom. In the fifth O site, O is bonded in a trigonal planar geometry to two Fe and one Si atom. In the sixth O site, O is bonded in a distorted trigonal planar geometry to two Fe and one Si atom. In the seventh O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the eighth O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the ninth O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the tenth O site, O is bonded in a trigonal planar geometry to one Li and two Si atoms. In the eleventh O site, O is bonded in a bent 120 degrees geometry to two Si atoms. In the twelfth O site, O is bonded in a 3-coordinate geometry to one Li, one Fe, and one Si atom. In the thirteenth O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the fourteenth O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the fifteenth O site, O is bonded in a 4-coordinate geometry to one Li, two Fe, and one Si atom. In the sixteenth O site, O is bonded in a 4-coordinate geometry to one Li, two Fe, and one Si atom. In the seventeenth O site, O is bonded in a trigonal planar geometry to one Li, one Fe, and one Si atom. In the eighteenth O site, O is bonded in a bent 120 degrees geometry to two Si atoms. In the nineteenth O site, O is bonded in a 3-coordinate geometry to one Li, one Fe, and one Si atom. In the twentieth O site, O is bonded in a bent 150 degrees geometry to one Fe and one Si atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li5Co4(Si3O10)2 by Materials Project

Li5Co4(Si3O10)2 is Chalcostibite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are five inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.02–2.66 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 trigonal pyramids that share corners with four SiO4 tetrahedra, an edgeedge with one LiO4 tetrahedra, and an edgeedge with one CoO5 trigonal bipyramid. There are a spread of Li–O bond distances ranging from 1.92–2.05 Å. In the third Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four SiO4 tetrahedra, corners with three equivalent CoO5 trigonal bipyramids, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Li–O bond distances ranging from 1.95–2.02 Å. In the fourth Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 2.00–2.51 Å. In the fifth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four SiO4 tetrahedra, corners with three equivalent CoO5 trigonal bipyramids, and an edgeedge with one CoO5 trigonal bipyramid. There are a spread of Li–O bond distances ranging from 1.91–2.09 Å. There are four inequivalent Co+2.75+ sites. In the first Co+2.75+ site, Co+2.75+ is bonded to five O2- atoms to form CoO5 trigonal bipyramids that share corners with three equivalent LiO4 tetrahedra, corners with five SiO4 tetrahedra, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Co–O bond distances ranging from 1.85–2.25 Å. In the second Co+2.75+ site, Co+2.75+ is bonded to five O2- atoms to form CoO5 trigonal bipyramids that share corners with three equivalent LiO4 tetrahedra, corners with five SiO4 tetrahedra, and an edgeedge with one CoO5 trigonal bipyramid. There are a spread of Co–O bond distances ranging from 1.88–2.21 Å. In the third Co+2.75+ site, Co+2.75+ is bonded to five O2- atoms to form distorted CoO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, an edgeedge with one LiO4 tetrahedra, and an edgeedge with one CoO5 trigonal bipyramid. There are a spread of Co–O bond distances ranging from 1.82–2.38 Å. In the fourth Co+2.75+ site, Co+2.75+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Co–O bond distances ranging from 1.96–2.60 Å. There are six inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and corners with two CoO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with three equivalent LiO4 tetrahedra, corners with three equivalent CoO5 trigonal bipyramids, and a cornercorner with one LiO4 trigonal pyramid. There are a spread of Si–O bond distances ranging from 1.64–1.67 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one SiO4 tetrahedra, and corners with four CoO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with three equivalent LiO4 tetrahedra, and corners with four CoO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the fifth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one SiO4 tetrahedra, a cornercorner with one CoO5 trigonal bipyramid, and corners with three equivalent LiO4 trigonal pyramids. There are a spread of Si–O bond distances ranging from 1.62–1.69 Å. In the sixth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and a cornercorner with one CoO5 trigonal bipyramid. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. There are twenty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to one Li1+ and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, two Co+2.75+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two Li1+, one Co+2.75+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Co+2.75+ and one Si4+ atom. In the eighth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+ and two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+ and two Si4+ atoms. In the twelfth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the thirteenth O2- site, O2- is bonded in a trigonal non-coplanar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, two Co+2.75+, and one Si4+ atom. In the fifteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the sixteenth O2- site, O2- is bonded to two Li1+, one Co+2.75+, and one Si4+ atom to form distorted corner-sharing OLi2CoSi tetrahedra. In the seventeenth O2- site, O2- is bonded to one Li1+, two Co+2.75+, and one Si4+ atom to form distorted corner-sharing OLiCo2Si tetrahedra. In the eighteenth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+ and two Si4+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom. In the twentieth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.75+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3NaY3(Si3O10)2 by Materials Project

NaBa3Y3(Si3O10)2 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.40–2.69 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–2.86 Å. In the second Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.30 Å. There are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to seven O2- atoms to form distorted YO7 pentagonal bipyramids that share corners with three SiO4 tetrahedra and edges with two SiO4 tetrahedra. There are a spread of Y–O bond distances ranging from 2.26–2.52 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 2.25–2.82 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YO7 pentagonal bipyramids and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.71 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one YO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one YO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one YO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one YO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Y3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Ba2+, one Y3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two equivalent Si4+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Ba2+, and two Si4+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ba2+ and two Si4+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two Y3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Y3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+, one Y3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, two Y3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Y3+, and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, two equivalent Ba2+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li5Fe4(Si3O10)2 by Materials Project

Li5Fe4(Si3O10)2 is Chalcostibite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are five inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.08–2.34 Å. In the second Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 trigonal pyramids that share corners with four SiO4 tetrahedra, corners with three equivalent FeO5 trigonal bipyramids, an edgeedge with one FeO5 trigonal bipyramid, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Li–O bond distances ranging from 1.90–2.11 Å. In the third Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 trigonal pyramids that share corners with four SiO4 tetrahedra, corners with three equivalent FeO5 trigonal bipyramids, an edgeedge with one FeO5 trigonal bipyramid, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Li–O bond distances ranging from 1.98–2.05 Å. In the fourth Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 1.97–2.75 Å. In the fifth Li1+ site, Li1+ is bonded to four O2- atoms to form distorted LiO4 tetrahedra that share corners with four SiO4 tetrahedra, corners with three equivalent FeO5 trigonal bipyramids, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Li–O bond distances ranging from 1.89–2.21 Å. There are four inequivalent Fe+2.75+ sites. In the first Fe+2.75+ site, Fe+2.75+ is bonded to five O2- atoms to form FeO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, corners with three equivalent LiO4 trigonal pyramids, an edgeedge with one FeO5 trigonal bipyramid, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Fe–O bond distances ranging from 1.94–2.12 Å. In the second Fe+2.75+ site, Fe+2.75+ is bonded to five O2- atoms to form FeO5 trigonal bipyramids that share corners with three equivalent LiO4 tetrahedra, corners with five SiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.95–2.17 Å. In the third Fe+2.75+ site, Fe+2.75+ is bonded to five O2- atoms to form distorted FeO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, an edgeedge with one LiO4 tetrahedra, and an edgeedge with one FeO5 trigonal bipyramid. There are a spread of Fe–O bond distances ranging from 1.90–2.32 Å. In the fourth Fe+2.75+ site, Fe+2.75+ is bonded to five O2- atoms to form distorted FeO5 trigonal bipyramids that share corners with five SiO4 tetrahedra, corners with three equivalent LiO4 trigonal pyramids, an edgeedge with one FeO5 trigonal bipyramid, and an edgeedge with one LiO4 trigonal pyramid. There are a spread of Fe–O bond distances ranging from 1.99–2.52 Å. There are six inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and corners with two FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with four FeO5 trigonal bipyramids, and corners with four LiO4 trigonal pyramids. There are a spread of Si–O bond distances ranging from 1.64–1.68 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one LiO4 tetrahedra, a cornercorner with one SiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with three equivalent LiO4 tetrahedra, and corners with four FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.63–1.66 Å. In the fifth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one SiO4 tetrahedra, corners with four FeO5 trigonal bipyramids, and corners with four LiO4 trigonal pyramids. There are a spread of Si–O bond distances ranging from 1.62–1.69 Å. In the sixth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two SiO4 tetrahedra and corners with two FeO5 trigonal bipyramids. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. There are twenty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to one Li1+ and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, two Fe+2.75+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Fe+2.75+ and one Si4+ atom. In the seventh O2- site, O2- is bonded to two Li1+, one Fe+2.75+, and one Si4+ atom to form distorted edge-sharing OLi2FeSi trigonal pyramids. In the eighth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+ and two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+ and two Si4+ atoms. In the twelfth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the thirteenth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the fourteenth O2- site, O2- is bonded to two Li1+, one Fe+2.75+, and one Si4+ atom to form distorted OLi2FeSi tetrahedra that share corners with three equivalent OLiFe2Si tetrahedra and an edgeedge with one OLi2FeSi trigonal pyramid. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, two Fe+2.75+, and one Si4+ atom. In the sixteenth O2- site, O2- is bonded to one Li1+, two Fe+2.75+, and one Si4+ atom to form a mixture of distorted corner and edge-sharing OLiFe2Si tetrahedra. In the seventeenth O2- site, O2- is bonded in a 3-coordinate geometry to two Li1+, one Fe+2.75+, and one Si4+ atom. In the eighteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and two Si4+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom. In the twentieth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.75+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs3KZr2(Si3O10)2 by Materials Project

Cs3KZr2(Si3O10)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are three inequivalent Cs sites. In the first Cs site, Cs is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of Cs–O bond distances ranging from 3.07–3.63 Å. In the second Cs site, Cs is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of Cs–O bond distances ranging from 3.05–3.45 Å. In the third Cs site, Cs is bonded in a 1-coordinate geometry to nine O atoms. There are a spread of Cs–O bond distances ranging from 2.97–3.61 Å. K is bonded in a 6-coordinate geometry to six O atoms. There are a spread of K–O bond distances ranging from 2.73–3.31 Å. There are two inequivalent Zr sites. In the first Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with six SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.10–2.14 Å. In the second Zr site, Zr is bonded to six O atoms to form ZrO6 octahedra that share corners with six SiO4 tetrahedra. There are a spread of Zr–O bond distances ranging from 2.08–2.18 Å. There are six inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–42°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–43°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 25–53°. 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 ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–57°. There are a spread of Si–O bond distances ranging from 1.61–1.67 Å. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 42–43°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two ZrO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 40–42°. There is two shorter (1.63 Å) and two longer (1.66 Å) Si–O bond length. There are twenty inequivalent O sites. In the first O site, O is bonded in a distorted bent 150 degrees geometry to one Cs, one Zr, and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one K, one Zr, and one Si atom. In the third O site, O is bonded in a 2-coordinate geometry to one Cs, one K, one Zr, and one Si atom. In the fourth O site, O is bonded in a 2-coordinate geometry to two Cs, one Zr, and one Si atom. In the fifth O site, O is bonded in a 3-coordinate geometry to one K, one Zr, and one Si atom. In the sixth O site, O is bonded in a distorted bent 120 degrees geometry to one Cs, one Zr, and one Si atom. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to two equivalent Cs and two Si atoms. In the eighth O site, O is bonded in a distorted bent 120 degrees geometry to two equivalent Cs and two Si atoms. In the ninth O site, O is bonded in a 2-coordinate geometry to two Cs, one Zr, and one Si atom. In the tenth O site, O is bonded in a 2-coordinate geometry to one Cs, one K, one Zr, and one Si atom. In the eleventh O site, O is bonded in a 2-coordinate geometry to one Cs, one Zr, and one Si atom. In the twelfth O site, O is bonded in a 2-coordinate geometry to two Cs, one Zr, and one Si atom. In the thirteenth O site, O is bonded in a 2-coordinate geometry to two Cs, one Zr, and one Si atom. In the fourteenth O site, O is bonded in a 2-coordinate geometry to one Cs, one Zr, and one Si atom. In the fifteenth O site, O is bonded in a distorted bent 120 degrees geometry to two equivalent Cs and two Si atoms. In the sixteenth O site, O is bonded in a distorted bent 120 degrees geometry to two equivalent Cs and two Si atoms. In the seventeenth O site, O is bonded in a distorted bent 120 degrees geometry to two Cs and two Si atoms. In the eighteenth O site, O is bonded in a distorted bent 120 degrees geometry to one Cs and two Si atoms. In the nineteenth O site, O is bonded in an L-shaped geometry to two equivalent K atoms. In the twentieth O site, O is bonded in a 3-coordinate geometry to three Cs atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaAl2(Si3O10)2 by Materials Project

CaAl2(Si3O10)2 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. Ca is bonded to eight O atoms to form distorted CaO8 hexagonal bipyramids that share corners with two SiO4 tetrahedra, an edgeedge with one SiO4 tetrahedra, and edges with two AlO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.33–2.79 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one CaO8 hexagonal bipyramid. There are a spread of Al–O bond distances ranging from 1.72–1.78 Å. In the second Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share corners with four SiO4 tetrahedra and an edgeedge with one CaO8 hexagonal bipyramid. There is two shorter (1.72 Å) and two longer (1.80 Å) Al–O bond length. 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 AlO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.65 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO8 hexagonal bipyramid, corners with two equivalent AlO4 tetrahedra, and corners with two SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and an edgeedge with one CaO8 hexagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one CaO8 hexagonal bipyramid, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the fifth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one AlO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.64 Å. In the sixth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one AlO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. There are twenty inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the third O site, O is bonded in a 2-coordinate geometry to one Ca, one Al, and one Si atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the fifth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. 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 distorted trigonal planar geometry to one Ca, one Al, and one Si atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the ninth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca, one Al, 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 bent 150 degrees geometry to two Si atoms. In the twelfth O site, O is bonded in a distorted trigonal planar geometry to one Ca, one Al, and one Si atom. In the thirteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the fourteenth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fifteenth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the seventeenth O site, O is bonded in a single-bond geometry to one Ca atom. In the eighteenth O site, O is bonded in a 1-coordinate geometry to one Ca and one O atom. The O–O bond length is 1.23 Å. In the nineteenth O site, O is bonded in an L-shaped geometry to one Ca and one O atom. In the twentieth O site, O is bonded in a single-bond geometry to one Ca atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CaAl2(Si3O10)2 by Materials Project

CaAl2(Si3O10)2 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. Ca is bonded to six O atoms to form distorted CaO6 octahedra that share corners with two AlO4 tetrahedra and an edgeedge with one SiO4 tetrahedra. There are a spread of Ca–O bond distances ranging from 2.39–2.50 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with four SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 53°. There is one shorter (1.73 Å) and three longer (1.77 Å) Al–O bond length. In the second Al site, Al is bonded to four O atoms to form AlO4 tetrahedra that share a cornercorner with one CaO6 octahedra and corners with four SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There is one shorter (1.73 Å) and three longer (1.78 Å) Al–O bond length. There are six inequivalent Si sites. In the first Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two AlO4 tetrahedra and corners with two SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the second Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share a cornercorner with one AlO4 tetrahedra and corners with three SiO4 tetrahedra. There is one shorter (1.62 Å) and three longer (1.63 Å) Si–O bond length. In the third Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and an edgeedge with one CaO6 octahedra. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the fourth Si site, Si is bonded to four O atoms to form SiO4 tetrahedra that share corners with two AlO4 tetrahedra and corners with two SiO4 tetrahedra. 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 AlO4 tetrahedra and corners with three SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the sixth Si site, Si is bonded to four O atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.62 Å) and one longer (1.63 Å) Si–O bond length. There are twenty inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the second O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the third O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the fourth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to two Si atoms. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to two Si atoms. In the eighth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the ninth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. 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 bent 150 degrees geometry to two Si atoms. In the twelfth O site, O is bonded in a 3-coordinate geometry to one Ca, one Al, and one Si atom. In the thirteenth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the fourteenth O site, O is bonded in a distorted bent 150 degrees geometry to two Si atoms. In the fifteenth O site, O is bonded in a bent 150 degrees geometry to one Al and one Si atom. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to two Si atoms. In the seventeenth O site, O is bonded in a single-bond geometry to one Ca atom. In the eighteenth O site, O is bonded in a single-bond geometry to one Ca atom. In the nineteenth O site, O is bonded in a single-bond geometry to one Ca atom. In the twentieth O site, O is bonded in a single-bond geometry to one Ca atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg2Al6(Si3O10)3 by Materials Project

SrMg2Al6Si9O30 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.76–3.14 Å. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.62–3.32 Å. There are four inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six SiO4 tetrahedra and an edgeedge with one AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.15–2.23 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one AlO4 tetrahedra, corners with five SiO4 tetrahedra, an edgeedge with one AlO4 tetrahedra, and an edgeedge with one AlO4 trigonal pyramid. There are a spread of Mg–O bond distances ranging from 2.05–2.25 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with three AlO4 tetrahedra, corners with three SiO4 tetrahedra, and an edgeedge with one AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.06–2.35 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with two AlO4 tetrahedra, corners with four SiO4 tetrahedra, an edgeedge with one AlO4 tetrahedra, and an edgeedge with one AlO4 trigonal pyramid. There are a spread of Mg–O bond distances ranging from 2.02–2.27 Å. There are twelve inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Al–O bond distances ranging from 1.74–1.77 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and edges with two MgO6 octahedra. There are a spread of Al–O bond distances ranging from 1.74–1.80 Å. In the third Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.78 Å) and two longer (1.80 Å) Al–O bond length. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.72–1.78 Å. In the fifth Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There is one shorter (1.78 Å) and three longer (1.79 Å) Al–O bond length. In the sixth Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Al–O bond distances ranging from 1.74–1.81 Å. In the seventh Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 trigonal pyramids that share a cornercorner with one AlO4 tetrahedra, corners with three SiO4 tetrahedra, and edges with two MgO6 octahedra. There are a spread of Al–O bond distances ranging from 1.75–1.80 Å. In the eighth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Al–O bond distances ranging from 1.70–1.76 Å. In the ninth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with three SiO4 tetrahedra, and a cornercorner with one AlO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.72–1.77 Å. In the tenth Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and edges with two MgO6 octahedra. There are a spread of Al–O bond distances ranging from 1.74–1.81 Å. In the eleventh Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.68–1.80 Å. In the twelfth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Al–O bond distances ranging from 1.68–1.79 Å. There are eighteen inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.59–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with three SiO4 tetrahedra, and a cornercorner with one AlO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one SiO4 tetrahedra, and corners with two AlO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.67 Å. In the fifth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the sixth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the seventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the eighth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, corners with two SiO4 tetrahedra, and a cornercorner with one AlO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 47°. There is two shorter (1.63 Å) and two longer (1.64 Å) Si–O bond length. In the ninth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the tenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.58–1.65 Å. In the eleventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the twelfth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the thirteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, corners with two SiO4 tetrahedra, and a cornercorner with one AlO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.62–1.64 Å. In the fourteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the fifteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the sixteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the seventeenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.58–1.67 Å. In the eighteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Si–O bond distances ranging from 1.59–1.66 Å. There are sixty inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Sr2+, one Al3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Sr2+ and two Si4+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sr2+ and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Sr2+, one Al3+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Al3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one Al3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+ and two Al3+ atoms. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the ninth O2- site

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaMg2Al6(Si3O10)3 by Materials Project

BaMg2Al6Si9O30 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Ba–O bond distances ranging from 2.79–3.23 Å. In the second Ba2+ site, Ba2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Ba–O bond distances ranging from 2.92–3.26 Å. There are four inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six SiO4 tetrahedra and an edgeedge with one AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.15–2.22 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one AlO4 tetrahedra, corners with five SiO4 tetrahedra, and edges with two AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.04–2.25 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with three AlO4 tetrahedra, corners with three SiO4 tetrahedra, and an edgeedge with one AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.05–2.35 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form distorted MgO6 octahedra that share corners with two AlO4 tetrahedra, corners with four SiO4 tetrahedra, and edges with two AlO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.01–2.27 Å. There are twelve inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Al–O bond distances ranging from 1.74–1.77 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and edges with two MgO6 octahedra. There are a spread of Al–O bond distances ranging from 1.74–1.80 Å. In the third Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Al–O bond distances ranging from 1.76–1.81 Å. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.72–1.77 Å. In the fifth Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There are a spread of Al–O bond distances ranging from 1.74–1.82 Å. In the sixth Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 tetrahedra that share corners with four SiO4 tetrahedra and edges with two MgO6 octahedra. There is two shorter (1.78 Å) and two longer (1.79 Å) Al–O bond length. In the seventh Al3+ site, Al3+ is bonded in a distorted rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.78 Å) and two longer (1.80 Å) Al–O bond length. In the eighth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Al–O bond distances ranging from 1.70–1.76 Å. In the ninth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.72–1.76 Å. In the tenth Al3+ site, Al3+ is bonded to four O2- atoms to form distorted AlO4 tetrahedra that share corners with two AlO4 tetrahedra, corners with two SiO4 tetrahedra, and edges with two MgO6 octahedra. There are a spread of Al–O bond distances ranging from 1.74–1.81 Å. In the eleventh Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Al–O bond distances ranging from 1.68–1.79 Å. In the twelfth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Al–O bond distances ranging from 1.68–1.79 Å. There are eighteen inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.58–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one SiO4 tetrahedra, and corners with two AlO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the fifth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the sixth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the seventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the eighth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. In the ninth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the tenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.59–1.66 Å. In the eleventh Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the twelfth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the thirteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are a spread of Si–O bond distances ranging from 1.61–1.66 Å. In the fourteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the fifteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.65 Å. In the sixteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with three SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are a spread of Si–O bond distances ranging from 1.61–1.64 Å. In the seventeenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are a spread of Si–O bond distances ranging from 1.58–1.66 Å. In the eighteenth Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one MgO6 octahedra, a cornercorner with one AlO4 tetrahedra, and corners with two SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are a spread of Si–O bond distances ranging from 1.58–1.66 Å. There are sixty inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ba2+, one Al3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ba2+ and two Si4+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+, one Al3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ba2+ and two Si4+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Al3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one Al3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+ and two Al3+ atoms. In the eighth O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one Al3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+, one Al3+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one Al3+, an

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SI3O10 by Materials Project

SO4(O2I)3 crystallizes in the orthorhombic Pna2_1 space group. The structure is one-dimensional and consists of eight sulfuric acid molecules and four O2I ribbons oriented in the (0, 1, 0) direction. In each O2I ribbon, there are twelve inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.91 Å) and one longer (2.12 Å) O–I bond lengths. In the second O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.79 Å. In the third O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.89 Å) and one longer (2.16 Å) O–I bond lengths. In the fourth O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.92 Å) and one longer (2.10 Å) O–I bond lengths. In the fifth O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.93 Å) and one longer (2.10 Å) O–I bond lengths. In the sixth O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.79 Å. In the seventh O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.90 Å) and one longer (2.13 Å) O–I bond lengths. In the eighth O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.78 Å. In the ninth O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.79 Å. In the tenth O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.87 Å) and one longer (2.23 Å) O–I bond lengths. In the eleventh O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.89 Å) and one longer (2.17 Å) O–I bond lengths. In the twelfth O site, O is bonded in a bent 120 degrees geometry to two I atoms. There are one shorter (1.89 Å) and one longer (2.17 Å) O–I bond lengths. There are six inequivalent I sites. In the first I site, I is bonded in a rectangular see-saw-like geometry to four O atoms. In the second I site, I is bonded in a rectangular see-saw-like geometry to four O atoms. In the third I site, I is bonded in a distorted trigonal non-coplanar geometry to three O atoms. In the fourth I site, I is bonded in a 3-coordinate geometry to three O atoms. In the fifth I site, I is bonded in a distorted trigonal non-coplanar geometry to three O atoms. In the sixth I site, I is bonded in a 4-coordinate geometry to three O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3NaGd3(Si3O10)2 by Materials Project

NaBa3Gd3Si6O20 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.42–2.77 Å. There are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–2.88 Å. In the second Ba2+ site, Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.66–3.00 Å. There are two inequivalent Gd3+ sites. In the first Gd3+ site, Gd3+ is bonded to seven O2- atoms to form distorted GdO7 pentagonal bipyramids that share corners with three SiO4 tetrahedra and edges with two SiO4 tetrahedra. There are a spread of Gd–O bond distances ranging from 2.29–2.56 Å. In the second Gd3+ site, Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.30–2.74 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent GdO7 pentagonal bipyramids and a cornercorner with one SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.71 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one GdO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one GdO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one GdO7 pentagonal bipyramid, a cornercorner with one SiO4 tetrahedra, and an edgeedge with one GdO7 pentagonal bipyramid. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.60–1.67 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Gd3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Ba2+, one Gd3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two equivalent Si4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and two Si4+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Ba2+ and two Si4+ atoms. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two Gd3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one Gd3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+, one Gd3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Ba2+, two Gd3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+ and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, two Gd3+, and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Na1+, two equivalent Ba2+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2TiFe5(Si3O10)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on BaY4Si5O17 by Materials Project

BaY4(Si2O7)(Si3O10) crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.16 Å. There are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 pentagonal pyramids that share corners with six SiO4 tetrahedra, an edgeedge with one YO6 octahedra, and edges with two equivalent YO6 pentagonal pyramids. There are a spread of Y–O bond distances ranging from 2.24–2.36 Å. In the second Y3+ site, Y3+ is bonded to six O2- atoms to form distorted YO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one YO6 octahedra, and an edgeedge with one YO6 pentagonal pyramid. There are a spread of Y–O bond distances ranging from 2.22–2.41 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent YO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 52–54°. There is two shorter (1.64 Å) and two longer (1.66 Å) Si–O bond length. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YO6 octahedra, corners with three equivalent YO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–51°. There are a spread of Si–O bond distances ranging from 1.63–1.69 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YO6 octahedra, corners with three equivalent YO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–57°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Y3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, one Y3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Y3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two equivalent Y3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two equivalent Y3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+ and two Si4+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one Y3+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrY2Si3O10 by Materials Project

SrY2(Si3O10) crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.92 Å. There are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Y–O bond distances ranging from 2.24–2.60 Å. In the second Y3+ site, Y3+ is bonded to six O2- atoms to form YO6 octahedra that share corners with six SiO4 tetrahedra. There are a spread of Y–O bond distances ranging from 2.20–2.37 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one YO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YO6 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 45–65°. There is one shorter (1.63 Å) and three longer (1.65 Å) Si–O bond length. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with three equivalent YO6 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 51–54°. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+, one Y3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Y3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, two equivalent Y3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two Si4+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+, one Y3+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, two Y3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Si4+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Sr2+, one Y3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Sr2+, one Y3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Y3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrYb4Si5O17 by Materials Project

SrYb4(Si2O7)(Si3O10) crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–2.66 Å. There are two inequivalent Yb3+ sites. In the first Yb3+ site, Yb3+ is bonded to six O2- atoms to form distorted YbO6 pentagonal pyramids that share corners with six SiO4 tetrahedra, an edgeedge with one YbO6 octahedra, and edges with two equivalent YbO6 pentagonal pyramids. There are a spread of Yb–O bond distances ranging from 2.30–2.38 Å. In the second Yb3+ site, Yb3+ is bonded to six O2- atoms to form distorted YbO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one YbO6 octahedra, and an edgeedge with one YbO6 pentagonal pyramid. There are a spread of Yb–O bond distances ranging from 2.29–2.37 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent YbO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YbO6 octahedra, corners with three equivalent YbO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–50°. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent YbO6 octahedra, corners with three equivalent YbO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 52–53°. There are a spread of Si–O bond distances ranging from 1.62–1.65 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Yb3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Yb3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, one Yb3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Yb3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Yb3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, two equivalent Yb3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to one Sr2+, two equivalent Yb3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Si4+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, one Yb3+, and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrSc4Si5O17 by Materials Project

SrSc4(Si2O7)(Si3O10) crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.55–2.98 Å. There are two inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded to six O2- atoms to form distorted ScO6 pentagonal pyramids that share corners with six SiO4 tetrahedra, an edgeedge with one ScO6 octahedra, and edges with two equivalent ScO6 pentagonal pyramids. There are a spread of Sc–O bond distances ranging from 2.10–2.25 Å. In the second Sc3+ site, Sc3+ is bonded to six O2- atoms to form distorted ScO6 octahedra that share corners with six SiO4 tetrahedra, an edgeedge with one ScO6 octahedra, and an edgeedge with one ScO6 pentagonal pyramid. There are a spread of Sc–O bond distances ranging from 2.07–2.26 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with four equivalent ScO6 octahedra and corners with two equivalent SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Si–O bond distances ranging from 1.63–1.65 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent ScO6 octahedra, corners with three equivalent ScO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent ScO6 octahedra, corners with three equivalent ScO6 pentagonal pyramids, and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–59°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Sc3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Sc3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, one Sc3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Sc3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Sc3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+, two equivalent Sc3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, two equivalent Sc3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two Si4+ atoms. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Sr2+, one Sc3+, and one Si4+ atom.

36 MATERIALS SCIENCE↗