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DOE OSTI2020

Materials Data on SrO6 by Materials Project

SrO6 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Sr is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.94 Å. There are three inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to one Sr and one O atom. The O–O bond length is 1.29 Å. In the second O site, O is bonded in a trigonal non-coplanar geometry to two equivalent Sr and one O atom. In the third O site, O is bonded in a 3-coordinate geometry to two equivalent Sr and one O atom. The O–O bond length is 1.35 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrO6 by Materials Project

SrO6 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Sr is bonded in a 10-coordinate geometry to ten O atoms. There are a spread of Sr–O bond distances ranging from 2.66–2.75 Å. There are three inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two equivalent Sr and one O atom. The O–O bond length is 1.32 Å. In the second O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Sr and one O atom. In the third O site, O is bonded in a water-like geometry to one Sr and one O atom. The O–O bond length is 1.29 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr22Nb10O47 by Materials Project

Sr22Nb10O47 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.51–2.72 Å. In the second Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.53–2.88 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with three equivalent NbO6 octahedra, a cornercorner with one SrO6 pentagonal pyramid, corners with three equivalent NbO5 trigonal bipyramids, and an edgeedge with one SrO7 hexagonal pyramid. The corner-sharing octahedra tilt angles range from 21–27°. There are a spread of Sr–O bond distances ranging from 2.41–2.76 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.57–2.82 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.44–3.21 Å. In the sixth Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with three equivalent NbO6 octahedra and corners with three equivalent NbO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 20–30°. There are a spread of Sr–O bond distances ranging from 2.39–2.77 Å. In the seventh Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.41–3.02 Å. In the eighth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.58–3.13 Å. In the ninth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.43–2.84 Å. In the tenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–3.04 Å. In the eleventh Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with three equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–32°. There are a spread of Sr–O bond distances ranging from 2.38–2.51 Å. In the twelfth Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.83 Å. In the thirteenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.44–3.17 Å. In the fourteenth Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with three equivalent NbO6 octahedra and corners with three equivalent NbO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 21–31°. There are a spread of Sr–O bond distances ranging from 2.40–2.70 Å. In the fifteenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.60–3.24 Å. In the sixteenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.43–3.02 Å. In the seventeenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.44–2.73 Å. In the eighteenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–3.08 Å. In the nineteenth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with three equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 28–33°. There are a spread of Sr–O bond distances ranging from 2.38–2.55 Å. In the twentieth Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.80 Å. In the twenty-first Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 pentagonal pyramids that share a cornercorner with one SrO7 hexagonal pyramid, a cornercorner with one SrO6 octahedra, corners with three equivalent NbO6 octahedra, corners with three equivalent NbO5 trigonal bipyramids, an edgeedge with one SrO7 hexagonal pyramid, and a faceface with one SrO7 hexagonal pyramid. The corner-sharing octahedra tilt angles range from 22–30°. There are a spread of Sr–O bond distances ranging from 2.42–2.74 Å. In the twenty-second Sr2+ site, Sr2+ is bonded to seven O2- atoms to form distorted SrO7 hexagonal pyramids that share a cornercorner with one SrO6 pentagonal pyramid, an edgeedge with one SrO6 octahedra, an edgeedge with one SrO6 pentagonal pyramid, edges with two equivalent NbO5 trigonal bipyramids, a faceface with one NbO6 octahedra, and a faceface with one SrO6 pentagonal pyramid. There are a spread of Sr–O bond distances ranging from 2.46–2.86 Å. There are ten inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to five O2- atoms to form NbO5 trigonal bipyramids that share corners with three equivalent SrO6 octahedra, corners with three equivalent SrO6 pentagonal pyramids, and edges with two equivalent SrO7 hexagonal pyramids. The corner-sharing octahedra tilt angles range from 35–71°. There are a spread of Nb–O bond distances ranging from 1.88–2.02 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six SrO6 octahedra. The corner-sharing octahedra tilt angles range from 20–30°. There are a spread of Nb–O bond distances ranging from 1.98–2.11 Å. In the third Nb5+ site, Nb5+ is bonded to five O2- atoms to form NbO5 trigonal bipyramids that share corners with three equivalent SrO6 octahedra and a cornercorner with one NbO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 46–58°. There are a spread of Nb–O bond distances ranging from 1.89–2.11 Å. In the fourth Nb5+ site, Nb5+ is bonded to five O2- atoms to form distorted corner-sharing NbO5 trigonal bipyramids. There are a spread of Nb–O bond distances ranging from 1.83–2.58 Å. In the fifth Nb5+ site, Nb5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Nb–O bond distances ranging from 1.89–2.35 Å. In the sixth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six SrO6 octahedra. The corner-sharing octahedra tilt angles range from 21–32°. There are a spread of Nb–O bond distances ranging from 1.99–2.09 Å. In the seventh Nb5+ site, Nb5+ is bonded to five O2- atoms to form NbO5 trigonal bipyramids that share corners with three equivalent SrO6 octahedra and a cornercorner with one NbO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 44–56°. There are a spread of Nb–O bond distances ranging from 1.89–2.10 Å. In the eighth Nb5+ site, Nb5+ is bonded to five O2- atoms to form distorted corner-sharing NbO5 trigonal bipyramids. There are a spread of Nb–O bond distances ranging from 1.83–2.48 Å. In the ninth Nb5+ site, Nb5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Nb–O bond distances ranging from 1.89–2.29 Å. In the tenth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with three equivalent SrO6 octahedra, corners with three equivalent SrO6 pentagonal pyramids, and a faceface with one SrO7 hexagonal pyramid. The corner-sharing octahedra tilt angles range from 28–33°. There are a spread of Nb–O bond distances ranging from 2.00–2.08 Å. There are forty-seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal bipyramidal geometry to four Sr2+ and one Nb5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Sr2+ and one Nb5+ atom. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the seventh O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the eighth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to three Sr2+ and one Nb5+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and two Nb5+ atoms. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three Sr2+ and one Nb5+ atom. In the twelfth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the thirteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Sr2+ and one Nb5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Sr2+ and one Nb5+ atom. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to two Sr2+ and two Nb5+ atoms. In the sixteenth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the seventeenth O2- site, O2- is bonded in a 1-coordinate geometry to two Sr2+ and one Nb5+ atom. In the eighteenth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+ and two Nb5+ atoms. In the nineteenth O2- site, O2- is bonded in a 1-coordinate geometry to four Sr2+ and one Nb5+ atom. In the twentieth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the twenty-first O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the twenty-second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Sr2+ and one Nb5+ atom. In the twenty-third O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the twenty-fifth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the twenty-sixth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the twenty-seventh O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the twenty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and two Nb5+ atoms. In the twenty-ninth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the thirtieth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the thirty-first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Sr2+ and one Nb5+ atom. In the thirty-second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Sr2+ and one Nb5+ atom. In the thirty-third O2- site, O2- is bonded in a 4-coordinate geometry to two Sr2+ and two Nb5+ atoms. In the thirty-fourth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the thirty-fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Sr2+ and two Nb5+ atoms. In the thirty-sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Sr2+ and one Nb5+ atom. In the thirty-seventh O2- site, O2- is bonded in a 1-coordinate geometry to four Sr2+ and one Nb5+ atom. In the thirty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to four Sr2+ and one Nb5+ atom. In the thirty-ninth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the fortieth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Nb5+ atom. In the forty-first O2- site, O2- is bonded in

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr9Zn2(CuO7)2 by Materials Project

Sr9Zn2(CuO7)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are nine inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with three SrO6 octahedra, edges with seven SrO6 octahedra, and edges with two equivalent ZnO4 tetrahedra. The corner-sharing octahedra tilt angles range from 3–55°. There are a spread of Sr–O bond distances ranging from 2.50–2.65 Å. In the second Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.56–2.95 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing SrO6 octahedra. The corner-sharing octahedra tilt angles range from 3–60°. There are a spread of Sr–O bond distances ranging from 2.43–2.82 Å. In the fourth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, a cornercorner with one ZnO4 tetrahedra, edges with five SrO6 octahedra, and edges with two equivalent ZnO4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are a spread of Sr–O bond distances ranging from 2.41–2.78 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.45–3.10 Å. In the sixth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with four SrO6 octahedra, corners with two equivalent ZnO4 tetrahedra, edges with two equivalent SrO6 octahedra, and a faceface with one SrO6 octahedra. The corner-sharing octahedra tilt angles range from 35–63°. There are a spread of Sr–O bond distances ranging from 2.45–2.61 Å. In the seventh Sr2+ site, Sr2+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing SrO6 octahedra. The corner-sharing octahedra tilt angles range from 2–63°. There are a spread of Sr–O bond distances ranging from 2.42–2.74 Å. In the eighth Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with four SrO6 octahedra, corners with two equivalent ZnO4 tetrahedra, edges with two equivalent SrO6 octahedra, and a faceface with one SrO6 octahedra. The corner-sharing octahedra tilt angles range from 21–60°. There are a spread of Sr–O bond distances ranging from 2.46–2.68 Å. In the ninth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.58–2.89 Å. There are two inequivalent Cu3+ sites. In the first Cu3+ site, Cu3+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.78 Å) and one longer (1.81 Å) Cu–O bond length. In the second Cu3+ site, Cu3+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.78 Å) and one longer (1.81 Å) Cu–O bond length. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent ZnO4 tetrahedra, and edges with two equivalent SrO6 octahedra. The corner-sharing octahedral tilt angles are 71°. There are a spread of Zn–O bond distances ranging from 1.93–2.03 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with three SrO6 octahedra, corners with two equivalent ZnO4 tetrahedra, and edges with two equivalent SrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–70°. There are a spread of Zn–O bond distances ranging from 1.94–2.02 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to five Sr2+ and one Zn2+ atom. In the second O2- site, O2- is bonded to five Sr2+ and one Zn2+ atom to form distorted OSr5Zn octahedra that share corners with two equivalent OSr5Cu octahedra, corners with four OSr4Zn square pyramids, edges with three OSr5Zn octahedra, an edgeedge with one OSr5 square pyramid, edges with two equivalent OSr5 trigonal bipyramids, and edges with two equivalent OSr2Zn2 trigonal pyramids. The corner-sharing octahedral tilt angles are 7°. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Cu3+ atom. In the fourth O2- site, O2- is bonded to four Sr2+ and one Zn2+ atom to form distorted OSr4Zn square pyramids that share corners with two equivalent OSr5Zn octahedra, corners with two equivalent OSr5 trigonal bipyramids, corners with two equivalent OSr2Zn2 trigonal pyramids, edges with two equivalent OSr4Zn square pyramids, and an edgeedge with one OSr5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 44°. In the fifth O2- site, O2- is bonded to five Sr2+ and one Cu3+ atom to form distorted OSr5Cu octahedra that share corners with two equivalent OSr5Zn octahedra, corners with two equivalent OSr5 square pyramids, corners with two equivalent OSr2Zn2 trigonal pyramids, edges with five OSr5Zn octahedra, and an edgeedge with one OSr5 square pyramid. The corner-sharing octahedral tilt angles are 7°. In the sixth O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+ and two equivalent Zn2+ atoms. In the seventh O2- site, O2- is bonded to five Sr2+ atoms to form distorted OSr5 trigonal bipyramids that share corners with two equivalent OSr5Cu octahedra, corners with two equivalent OSr4Zn square pyramids, edges with three OSr5Zn octahedra, edges with three OSr4Zn square pyramids, and edges with two equivalent OSr5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 16°. In the eighth O2- site, O2- is bonded to five Sr2+ atoms to form distorted OSr5 square pyramids that share corners with four OSr5Cu octahedra, edges with four OSr5Zn octahedra, edges with two equivalent OSr5 square pyramids, and edges with two equivalent OSr5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 10–24°. In the ninth O2- site, O2- is bonded to two Sr2+ and two equivalent Zn2+ atoms to form distorted OSr2Zn2 trigonal pyramids that share corners with two equivalent OSr5Cu octahedra, corners with two equivalent OSr4Zn square pyramids, corners with two equivalent OSr2Zn2 trigonal pyramids, and edges with two equivalent OSr5Zn octahedra. The corner-sharing octahedra tilt angles range from 74–75°. In the tenth O2- site, O2- is bonded to five Sr2+ and one Cu3+ atom to form distorted OSr5Cu octahedra that share corners with two equivalent OSr5 trigonal bipyramids, edges with four OSr5Cu octahedra, edges with two equivalent OSr5 square pyramids, and an edgeedge with one OSr5 trigonal bipyramid. In the eleventh O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Cu3+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to three Sr2+ atoms. In the thirteenth O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Zn2+ atom. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to four Sr2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr4Nb2O9 by Materials Project

Sr4Nb2O9 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are five inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 pentagonal pyramids that share corners with three equivalent SrO6 octahedra, corners with three equivalent NbO6 octahedra, edges with three equivalent NbO6 octahedra, and a faceface with one SrO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 21–70°. There are a spread of Sr–O bond distances ranging from 2.47–2.65 Å. In the second Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 pentagonal pyramids that share corners with three equivalent SrO6 octahedra, corners with three equivalent NbO6 octahedra, edges with three equivalent NbO6 octahedra, and a faceface with one SrO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 21–69°. There are a spread of Sr–O bond distances ranging from 2.48–2.62 Å. In the third Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–3.08 Å. In the fourth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six equivalent NbO6 octahedra and corners with six equivalent SrO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 33–35°. There are two shorter (2.49 Å) and four longer (2.50 Å) Sr–O bond lengths. In the fifth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six equivalent NbO6 octahedra and corners with six equivalent SrO6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 34°. All Sr–O bond lengths are 2.52 Å. There are two inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with three equivalent SrO6 octahedra, corners with three equivalent SrO6 pentagonal pyramids, edges with three equivalent SrO6 pentagonal pyramids, and a faceface with one NbO6 octahedra. The corner-sharing octahedral tilt angles are 34°. There are a spread of Nb–O bond distances ranging from 1.91–2.21 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with three equivalent SrO6 octahedra, corners with three equivalent SrO6 pentagonal pyramids, edges with three equivalent SrO6 pentagonal pyramids, and a faceface with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 33–35°. There are a spread of Nb–O bond distances ranging from 1.91–2.21 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the third O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted corner and edge-sharing OSr3Nb2 square pyramids. In the fourth O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted corner and edge-sharing OSr3Nb2 square pyramids. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the seventh O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted corner and edge-sharing OSr3Nb2 square pyramids. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr9Zn4(CuO7)2 by Materials Project

Sr9Zn4(CuO7)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are five inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with three SrO6 octahedra, edges with seven SrO6 octahedra, and edges with two equivalent ZnO4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–59°. There are a spread of Sr–O bond distances ranging from 2.48–2.65 Å. In the second Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.56–2.86 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, a cornercorner with one ZnO4 tetrahedra, edges with five SrO6 octahedra, and edges with two equivalent ZnO4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Sr–O bond distances ranging from 2.45–2.71 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.46–2.88 Å. In the fifth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four equivalent ZnO4 tetrahedra, and edges with two equivalent SrO6 octahedra. The corner-sharing octahedral tilt angles are 59°. There are two shorter (2.45 Å) and four longer (2.62 Å) Sr–O bond lengths. Cu1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.81 Å) and one longer (1.86 Å) Cu–O bond length. There are two inequivalent Zn2+ sites. In the first Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with three SrO6 octahedra, corners with three ZnO4 tetrahedra, and edges with two equivalent SrO6 octahedra. The corner-sharing octahedra tilt angles range from 3–71°. There are a spread of Zn–O bond distances ranging from 1.97–2.05 Å. In the second Zn2+ site, Zn2+ is bonded to four O2- atoms to form ZnO4 tetrahedra that share corners with three ZnO4 tetrahedra and edges with two equivalent SrO6 octahedra. There are a spread of Zn–O bond distances ranging from 1.97–2.10 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Cu1+ atom. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four Sr2+ and two Zn2+ atoms. In the third O2- site, O2- is bonded to five Sr2+ and one Cu1+ atom to form OSr5Cu octahedra that share corners with four OSr5Zn octahedra, corners with two equivalent OSr2Zn2 tetrahedra, and edges with eight OSr5Cu octahedra. The corner-sharing octahedra tilt angles range from 4–8°. In the fourth O2- site, O2- is bonded in a 5-coordinate geometry to three Sr2+ and two equivalent Zn2+ atoms. In the fifth O2- site, O2- is bonded to two Sr2+ and two equivalent Zn2+ atoms to form distorted OSr2Zn2 tetrahedra that share corners with three OSr5Cu octahedra, corners with two equivalent OSr2Zn2 tetrahedra, and edges with two equivalent OSr5Zn octahedra. The corner-sharing octahedra tilt angles range from 23–69°. In the sixth O2- site, O2- is bonded to five Sr2+ and one Zn2+ atom to form distorted OSr5Zn octahedra that share corners with four OSr5Cu octahedra, a cornercorner with one OSr2Zn2 tetrahedra, and edges with eight OSr5Cu octahedra. The corner-sharing octahedra tilt angles range from 4–12°. In the seventh O2- site, O2- is bonded to five Sr2+ and one Zn2+ atom to form OSr5Zn octahedra that share corners with four OSr5Cu octahedra, edges with eight OSr5Cu octahedra, and edges with two equivalent OSr2Zn2 tetrahedra. The corner-sharing octahedra tilt angles range from 8–12°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr3Tl2O6 by Materials Project

Sr3Tl2O6 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to seven O2- atoms to form distorted SrO7 pentagonal bipyramids that share corners with two equivalent TlO6 octahedra, corners with six SrO6 octahedra, a cornercorner with one SrO7 pentagonal bipyramid, edges with three SrO6 octahedra, edges with four equivalent TlO6 octahedra, and faces with two equivalent SrO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 23–71°. There are a spread of Sr–O bond distances ranging from 2.59–2.77 Å. In the second Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with four SrO6 octahedra, corners with two equivalent SrO7 pentagonal bipyramids, edges with three equivalent SrO6 octahedra, edges with six TlO6 octahedra, and an edgeedge with one SrO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 0–74°. There are a spread of Sr–O bond distances ranging from 2.48–2.59 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent TlO6 octahedra, corners with four equivalent SrO7 pentagonal bipyramids, edges with two equivalent SrO6 octahedra, edges with four TlO6 octahedra, and edges with two equivalent SrO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 9–74°. There are a spread of Sr–O bond distances ranging from 2.51–2.60 Å. There are two inequivalent Tl3+ sites. In the first Tl3+ site, Tl3+ is bonded to six O2- atoms to form TlO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with three TlO6 octahedra, corners with two equivalent SrO7 pentagonal bipyramids, edges with three TlO6 octahedra, and edges with six SrO6 octahedra. The corner-sharing octahedra tilt angles range from 0–56°. There are a spread of Tl–O bond distances ranging from 2.27–2.77 Å. In the second Tl3+ site, Tl3+ is bonded to six O2- atoms to form TlO6 octahedra that share corners with four TlO6 octahedra, edges with four SrO6 octahedra, edges with four TlO6 octahedra, and edges with four equivalent SrO7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 0–7°. There are a spread of Tl–O bond distances ranging from 2.10–2.73 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and four equivalent Tl3+ atoms to form OSr2Tl4 octahedra that share corners with four equivalent OSr2Tl4 octahedra, corners with four equivalent OSr4Tl trigonal bipyramids, edges with four OSr2Tl4 octahedra, and edges with four equivalent OSr4Tl trigonal bipyramids. The corner-sharing octahedral tilt angles are 5°. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four Sr2+ and one Tl3+ atom. In the third O2- site, O2- is bonded to four equivalent Sr2+ and two equivalent Tl3+ atoms to form OSr4Tl2 octahedra that share corners with two equivalent OSr4Tl trigonal bipyramids, edges with six OSr2Tl4 octahedra, and edges with four equivalent OSr2Tl2 tetrahedra. In the fourth O2- site, O2- is bonded to four Sr2+ and one Tl3+ atom to form distorted OSr4Tl trigonal bipyramids that share corners with two equivalent OSr2Tl2 tetrahedra, corners with four equivalent OSr4Tl trigonal bipyramids, edges with four OSr2Tl4 octahedra, and edges with four OSr4Tl trigonal bipyramids. In the fifth O2- site, O2- is bonded to four Sr2+ and one Tl3+ atom to form distorted OSr4Tl trigonal bipyramids that share corners with three OSr2Tl4 octahedra, corners with four equivalent OSr2Tl2 tetrahedra, corners with four equivalent OSr4Tl trigonal bipyramids, edges with two equivalent OSr2Tl4 octahedra, and edges with four OSr4Tl trigonal bipyramids. The corner-sharing octahedra tilt angles range from 7–43°. In the sixth O2- site, O2- is bonded to two Sr2+ and two equivalent Tl3+ atoms to form OSr2Tl2 tetrahedra that share corners with four equivalent OSr2Tl4 octahedra, corners with two equivalent OSr2Tl2 tetrahedra, corners with six OSr4Tl trigonal bipyramids, and edges with three OSr2Tl4 octahedra. The corner-sharing octahedra tilt angles range from 8–13°. In the seventh O2- site, O2- is bonded to two Sr2+ and four Tl3+ atoms to form OSr2Tl4 octahedra that share corners with two equivalent OSr2Tl4 octahedra, corners with four equivalent OSr2Tl2 tetrahedra, edges with five OSr2Tl4 octahedra, an edgeedge with one OSr2Tl2 tetrahedra, and edges with four OSr4Tl trigonal bipyramids. The corner-sharing octahedral tilt angles are 5°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba4Sr2Sm2Co4O15 by Materials Project

Ba4Sr2Sm2Co4O15 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight 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 2.75–3.40 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 2.76–3.07 Å. In the third 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 2.75–3.33 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.77–3.43 Å. In the fifth 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 2.76–3.30 Å. In the sixth 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 2.76–3.39 Å. In the seventh Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form distorted BaO12 cuboctahedra that share faces with two equivalent CoO6 octahedra and faces with three CoO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.67–3.24 Å. In the eighth Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form distorted BaO12 cuboctahedra that share faces with two equivalent CoO6 octahedra and faces with three CoO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.78–3.26 Å. There are four inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six CoO4 tetrahedra and faces with two equivalent SrO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.48–2.59 Å. In the second Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six CoO4 tetrahedra and faces with two equivalent SrO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.46–2.61 Å. In the third Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.46–2.73 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.73 Å. There are four inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.34–2.61 Å. In the second Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.36–2.54 Å. In the third Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.35–2.61 Å. In the fourth Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sm–O bond distances ranging from 2.37–2.58 Å. There are eight inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with three CoO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. There are a spread of Co–O bond distances ranging from 1.92–2.07 Å. In the second Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with three CoO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. There are a spread of Co–O bond distances ranging from 1.89–2.22 Å. In the third Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 5–62°. There are a spread of Co–O bond distances ranging from 1.82–1.94 Å. In the fourth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 4–61°. There are a spread of Co–O bond distances ranging from 1.81–1.95 Å. In the fifth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 7–63°. There are a spread of Co–O bond distances ranging from 1.82–1.94 Å. In the sixth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 5–62°. There are a spread of Co–O bond distances ranging from 1.82–1.90 Å. In the seventh Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 8–65°. There are a spread of Co–O bond distances ranging from 1.81–1.93 Å. In the eighth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 2–62°. There are a spread of Co–O bond distances ranging from 1.81–1.93 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one Sm3+, and two Co3+ atoms. In the second O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, two Sm3+, and two Co3+ atoms. In the third O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one Sm3+, and two Co3+ atoms. In the fourth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one Sm3+, and two Co3+ atoms. In the fifth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one Sm3+, and two Co3+ atoms. In the sixth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, two Sm3+, and two Co3+ atoms. In the seventh O2- site, O2- is bonded to three Ba2+, two Sm3+, and one Co3+ atom to form distorted face-sharing OBa3Sm2Co octahedra. In the eighth O2- site, O2- is bonded to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom to form distorted face-sharing OBa3SrSmCo octahedra. In the ninth O2- site, O2- is bonded to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom to form distorted face-sharing OBa3SrSmCo octahedra. In the tenth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two Sm3+, and one Co3+ atom. In the eleventh O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twelfth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the fifteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the sixteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the seventeenth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, two Sr2+, and one Co3+ atom. In the eighteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the nineteenth O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twentieth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two Sm3+, and one Co3+ atom. In the twenty-first O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-second O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-third O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-fourth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two Sm3+, and one Co3+ atom. In the twenty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-sixth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two Sm3+, and one Co3+ atom. In the twenty-seventh O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the twenty-ninth O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one Sm3+, and one Co3+ atom. In the thirtieth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two Sm3+, and one Co3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba4Sr2La2Co4O15 by Materials Project

Ba4Sr2La2Co4O15 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form distorted BaO12 cuboctahedra that share faces with two equivalent CoO6 octahedra and faces with three CoO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.77–3.25 Å. In the second Ba2+ site, Ba2+ is bonded to twelve O2- atoms to form BaO12 cuboctahedra that share faces with two equivalent CoO6 octahedra and faces with three CoO4 tetrahedra. There are a spread of Ba–O bond distances ranging from 2.77–3.24 Å. In the third 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 2.77–3.07 Å. In the fourth 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 2.79–3.37 Å. In the fifth 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 2.76–3.43 Å. In the sixth 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 2.79–3.37 Å. In the seventh 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 2.77–3.07 Å. In the eighth 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 2.76–3.41 Å. There are four inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six CoO4 tetrahedra and faces with two equivalent SrO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.49–2.62 Å. In the second Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six CoO4 tetrahedra and faces with two equivalent SrO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.49–2.62 Å. In the third Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.73 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.73 Å. There are four 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 2.38–2.68 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 2.40–2.68 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 2.38–2.69 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 2.40–2.68 Å. There are eight inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–63°. There are a spread of Co–O bond distances ranging from 1.81–1.94 Å. In the second Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 4–64°. There are a spread of Co–O bond distances ranging from 1.82–1.94 Å. In the third Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–63°. There are a spread of Co–O bond distances ranging from 1.83–1.92 Å. In the fourth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 4–64°. There are a spread of Co–O bond distances ranging from 1.82–1.94 Å. In the fifth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–63°. There are a spread of Co–O bond distances ranging from 1.81–1.94 Å. In the sixth Co3+ site, Co3+ is bonded to four O2- atoms to form CoO4 tetrahedra that share a cornercorner with one CoO6 octahedra, corners with two SrO6 octahedra, and a faceface with one BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–64°. There is two shorter (1.83 Å) and two longer (1.92 Å) Co–O bond length. In the seventh Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with three CoO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. There are a spread of Co–O bond distances ranging from 1.86–2.26 Å. In the eighth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with three CoO4 tetrahedra and faces with two equivalent BaO12 cuboctahedra. There are a spread of Co–O bond distances ranging from 1.86–2.26 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two La3+, and one Co3+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, two La3+, and one Co3+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, two La3+, and one Co3+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the tenth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, two La3+, and one Co3+ atom. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the thirteenth O2- site, O2- is bonded to three Ba2+, one Sr2+, one La3+, and one Co3+ atom to form distorted face-sharing OBa3SrLaCo octahedra. In the fourteenth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the fifteenth O2- site, O2- is bonded to three Ba2+, two La3+, and one Co3+ atom to form distorted OBa3La2Co octahedra that share corners with two equivalent OBa3La2Co octahedra and a faceface with one OBa3SrLaCo octahedra. The corner-sharing octahedral tilt angles are 35°. In the sixteenth O2- site, O2- is bonded in a 6-coordinate geometry to three Ba2+, one Sr2+, one La3+, and one Co3+ atom. In the seventeenth O2- site, O2- is bonded to three Ba2+, one Sr2+, one La3+, and one Co3+ atom to form distorted face-sharing OBa3SrLaCo octahedra. In the eighteenth O2- site, O2- is bonded to three Ba2+, two La3+, and one Co3+ atom to form distorted OBa3La2Co octahedra that share corners with two equivalent OBa3La2Co octahedra and a faceface with one OBa3SrLaCo octahedra. The corner-sharing octahedral tilt angles are 35°. In the nineteenth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, two La3+, and two Co3+ atoms. In the twentieth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one La3+, and two Co3+ atoms. In the twenty-first O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one La3+, and two Co3+ atoms. In the twenty-second O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one La3+, and two Co3+ atoms. In the twenty-third O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, two La3+, and two Co3+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 6-coordinate geometry to two Ba2+, one Sr2+, one La3+, and two Co3+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the twenty-sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, two Sr2+, and one Co3+ atom. In the twenty-seventh O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the twenty-eighth O2- site, O2- is bonded in a 1-coordinate geometry to two Ba2+, two Sr2+, and one Co3+ atom. In the twenty-ninth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom. In the thirtieth O2- site, O2- is bonded in a 1-coordinate geometry to three Ba2+, two Sr2+, and one Co3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba3Sr4O7 by Materials Project

Ba3Sr4O7 is Caswellsilverite-like structured and crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to six O2- atoms to form BaO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four BaO6 octahedra, edges with three BaO6 octahedra, and edges with nine SrO6 octahedra. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Ba–O bond distances ranging from 2.69–2.81 Å. In the second Ba2+ site, Ba2+ is bonded to six O2- atoms to form BaO6 octahedra that share corners with six BaO6 octahedra, edges with four BaO6 octahedra, and edges with eight equivalent SrO6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are two shorter (2.70 Å) and four longer (2.74 Å) Ba–O bond lengths. There are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent BaO6 octahedra, corners with four SrO6 octahedra, edges with five equivalent BaO6 octahedra, and edges with seven SrO6 octahedra. The corner-sharing octahedra tilt angles range from 2–8°. There are a spread of Sr–O bond distances ranging from 2.53–2.76 Å. In the second Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six SrO6 octahedra, edges with four SrO6 octahedra, and edges with eight BaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are two shorter (2.64 Å) and four longer (2.70 Å) Sr–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Ba2+ and four Sr2+ atoms to form a mixture of corner and edge-sharing OBa2Sr4 octahedra. The corner-sharing octahedra tilt angles range from 1–5°. In the second O2- site, O2- is bonded to two equivalent Ba2+ and four equivalent Sr2+ atoms to form a mixture of corner and edge-sharing OBa2Sr4 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the third O2- site, O2- is bonded to two equivalent Ba2+ and four equivalent Sr2+ atoms to form a mixture of corner and edge-sharing OBa2Sr4 octahedra. The corner-sharing octahedra tilt angles range from 2–8°. In the fourth O2- site, O2- is bonded to four Ba2+ and two equivalent Sr2+ atoms to form a mixture of corner and edge-sharing OBa4Sr2 octahedra. The corner-sharing octahedra tilt angles range from 0–2°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrCaMg14O16 by Materials Project

SrCaMg14O16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent CaO6 octahedra, corners with two equivalent MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Sr–O bond distances ranging from 2.22–2.37 Å. Ca2+ is bonded to six O2- atoms to form CaO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent CaO6 octahedra, corners with two equivalent MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Ca–O bond distances ranging from 2.14–2.31 Å. There are ten inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent CaO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 2.04–2.22 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 1.98–2.23 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, edges with two equivalent CaO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.17–2.25 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, edges with two equivalent CaO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.17–2.25 Å. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Mg–O bond distances ranging from 2.16–2.22 Å. In the sixth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent CaO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Mg–O bond distances ranging from 2.11–2.23 Å. In the seventh Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.09–2.26 Å. In the eighth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent CaO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Mg–O bond distances ranging from 2.11–2.23 Å. In the ninth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.09–2.26 Å. In the tenth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, an edgeedge with one SrO6 octahedra, an edgeedge with one CaO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.10–2.25 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded to one Ca2+ and five Mg2+ atoms to form OCaMg5 octahedra that share corners with six OCaMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the second O2- site, O2- is bonded to one Sr2+ and five Mg2+ atoms to form OSrMg5 octahedra that share corners with six OCaMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the third O2- site, O2- is bonded to one Sr2+ and five Mg2+ atoms to form OSrMg5 octahedra that share corners with six OCaMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. Both O–Mg bond lengths are 2.24 Å. In the fourth O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six equivalent OMg6 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. In the fifth O2- site, O2- is bonded to two equivalent Ca2+ and four Mg2+ atoms to form OCa2Mg4 octahedra that share corners with six OCa2Mg4 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the sixth O2- site, O2- is bonded to two equivalent Sr2+ and four Mg2+ atoms to form OSr2Mg4 octahedra that share corners with six OCa2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the seventh O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OCa2Mg4 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the eighth O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OSr2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the ninth O2- site, O2- is bonded to one Sr2+, one Ca2+, and four Mg2+ atoms to form OSrCaMg4 octahedra that share corners with six OSrCaMg4 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the tenth O2- site, O2- is bonded to one Sr2+, one Ca2+, and four Mg2+ atoms to form OSrCaMg4 octahedra that share corners with six OSrCaMg4 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. Both O–Mg bond lengths are 2.25 Å. In the eleventh O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OSrCaMg4 octahedra and edges with twelve OCaMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–1°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr4Nb2O9 by Materials Project

Sr4Nb2O9 is Orthorhombic Perovskite-like structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are five inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.44–2.71 Å. In the second Sr2+ site, Sr2+ is bonded in a 3-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–3.12 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 26–40°. There are a spread of Sr–O bond distances ranging from 2.42–2.52 Å. In the fourth Sr2+ site, Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with six equivalent NbO6 octahedra and corners with six equivalent SrO6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 33–35°. There are a spread of Sr–O bond distances ranging from 2.47–2.54 Å. In the fifth Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 pentagonal pyramids that share corners with three equivalent SrO6 octahedra, corners with three equivalent NbO6 octahedra, and edges with three equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 20–70°. There are a spread of Sr–O bond distances ranging from 2.49–2.69 Å. There are two inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with three equivalent SrO6 octahedra, edges with three equivalent SrO6 pentagonal pyramids, and a faceface with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 33–35°. There are a spread of Nb–O bond distances ranging from 1.91–2.22 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with three equivalent SrO6 octahedra, corners with three equivalent SrO6 pentagonal pyramids, and a faceface with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 26–40°. There are a spread of Nb–O bond distances ranging from 1.90–2.23 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the fourth O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted edge and corner-sharing OSr3Nb2 trigonal bipyramids. In the fifth O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted edge and corner-sharing OSr3Nb2 square pyramids. In the sixth O2- site, O2- is bonded to three Sr2+ and two Nb5+ atoms to form a mixture of distorted edge and corner-sharing OSr3Nb2 square pyramids. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Sr2+ and one Nb5+ atom. In the eighth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Nb5+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one Nb5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg14MnO16 by Materials Project

SrMg14MnO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. Sr2+ is bonded to six O2- atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent MnO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Sr–O bond distances ranging from 2.21–2.36 Å. There are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 2.07–2.21 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 1.98–2.21 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–3°. There are a spread of Mg–O bond distances ranging from 2.10–2.25 Å. In the fourth Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.16–2.21 Å. In the fifth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. There are a spread of Mg–O bond distances ranging from 2.15–2.21 Å. In the sixth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. There are a spread of Mg–O bond distances ranging from 2.09–2.26 Å. In the seventh Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. There are a spread of Mg–O bond distances ranging from 2.09–2.26 Å. In the eighth Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, an edgeedge with one SrO6 octahedra, an edgeedge with one MnO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Mg–O bond distances ranging from 2.11–2.24 Å. Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent MnO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mn–O bond distances ranging from 2.03–2.28 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded to five Mg2+ and one Mn2+ atom to form OMg5Mn octahedra that share corners with six OMg5Mn octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–4°. In the second O2- site, O2- is bonded to one Sr2+ and five Mg2+ atoms to form OSrMg5 octahedra that share corners with six OMg5Mn octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the third O2- site, O2- is bonded to one Sr2+ and five Mg2+ atoms to form OSrMg5 octahedra that share corners with six OMg5Mn octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. Both O–Mg bond lengths are 2.22 Å. In the fourth O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six equivalent OMg6 octahedra and edges with twelve OMg5Mn octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the fifth O2- site, O2- is bonded to four Mg2+ and two equivalent Mn2+ atoms to form OMg4Mn2 octahedra that share corners with six OMg4Mn2 octahedra and edges with twelve OMg5Mn octahedra. The corner-sharing octahedral tilt angles are 0°. In the sixth O2- site, O2- is bonded to two equivalent Sr2+ and four Mg2+ atoms to form OSr2Mg4 octahedra that share corners with six OMg4Mn2 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the seventh O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OMg4Mn2 octahedra and edges with twelve OMg5Mn octahedra. The corner-sharing octahedral tilt angles are 0°. In the eighth O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OSr2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the ninth O2- site, O2- is bonded to one Sr2+, four Mg2+, and one Mn2+ atom to form OSrMg4Mn octahedra that share corners with six OSrMg4Mn octahedra and edges with twelve OMg5Mn octahedra. The corner-sharing octahedra tilt angles range from 0–3°. In the tenth O2- site, O2- is bonded to six Mg2+ atoms to form OMg6 octahedra that share corners with six OSrMg4Mn octahedra and edges with twelve OMg5Mn octahedra. The corner-sharing octahedra tilt angles range from 0–2°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrYMg14O16 by Materials Project

SrMg14YO16 is alpha Po-derived structured and crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. Sr is bonded to six O atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent YO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Sr–O bond distances ranging from 2.24–2.40 Å. There are eight inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent YO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 2.10–2.24 Å. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 2.00–2.27 Å. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, edges with two equivalent YO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.20–2.27 Å. In the fourth Mg site, Mg is bonded to six O atoms to form a mixture of corner and edge-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–O bond distances ranging from 2.20–2.25 Å. In the fifth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent YO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.08–2.32 Å. In the sixth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.09–2.31 Å. In the seventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. There are a spread of Mg–O bond distances ranging from 2.09–2.31 Å. In the eighth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, an edgeedge with one SrO6 octahedra, an edgeedge with one YO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Mg–O bond distances ranging from 2.08–2.32 Å. Y is bonded to six O atoms to form YO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent YO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Y–O bond distances ranging from 2.16–2.30 Å. There are ten inequivalent O sites. In the first O site, O is bonded to five Mg and one Y atom to form OYMg5 octahedra that share corners with six OYMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the second O site, O is bonded to one Sr and five Mg atoms to form OSrMg5 octahedra that share corners with six OYMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the third O site, O is bonded to one Sr and five Mg atoms to form OSrMg5 octahedra that share corners with six OYMg5 octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. Both O–Mg bond lengths are 2.21 Å. In the fourth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six equivalent OMg6 octahedra and edges with twelve OYMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the fifth O site, O is bonded to four Mg and two equivalent Y atoms to form OY2Mg4 octahedra that share corners with six OY2Mg4 octahedra and edges with twelve OYMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the sixth O site, O is bonded to two equivalent Sr and four Mg atoms to form OSr2Mg4 octahedra that share corners with six OY2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the seventh O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OY2Mg4 octahedra and edges with twelve OYMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the eighth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OSr2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the ninth O site, O is bonded to one Sr, four Mg, and one Y atom to form OSrYMg4 octahedra that share corners with six OSrYMg4 octahedra and edges with twelve OYMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–6°. In the tenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OSrYMg4 octahedra and edges with twelve OYMg5 octahedra. The corner-sharing octahedra tilt angles range from 0–4°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrGeO3 by Materials Project

SrGeO3 is Esseneite-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are six inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.68 Å. In the second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.58–2.85 Å. In the third Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.82 Å. In the fourth Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with four GeO4 tetrahedra, an edgeedge with one SrO6 octahedra, and an edgeedge with one GeO4 tetrahedra. There are a spread of Sr–O bond distances ranging from 2.45–2.82 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.70 Å. In the sixth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.57–2.85 Å. There are six inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one SrO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of Ge–O bond distances ranging from 1.74–1.82 Å. In the second Ge4+ site, Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There are a spread of Ge–O bond distances ranging from 1.75–1.82 Å. In the third Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one SrO6 octahedra, corners with two GeO4 tetrahedra, and an edgeedge with one SrO6 octahedra. The corner-sharing octahedral tilt angles are 73°. There are a spread of Ge–O bond distances ranging from 1.75–1.82 Å. In the fourth Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one SrO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Ge–O bond distances ranging from 1.75–1.82 Å. In the fifth Ge4+ site, Ge4+ is bonded to four O2- atoms to form corner-sharing GeO4 tetrahedra. There is two shorter (1.73 Å) and two longer (1.85 Å) Ge–O bond length. In the sixth Ge4+ site, Ge4+ is bonded to four O2- atoms to form GeO4 tetrahedra that share a cornercorner with one SrO6 octahedra and corners with two GeO4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. There is two shorter (1.73 Å) and two longer (1.84 Å) Ge–O bond length. There are eighteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two Ge4+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the third O2- site, O2- is bonded to three Sr2+ and one Ge4+ atom to form a mixture of distorted edge and corner-sharing OSr3Ge trigonal pyramids. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two Ge4+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sr2+ and two Ge4+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two Ge4+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the thirteenth O2- site, O2- is bonded to three Sr2+ and one Ge4+ atom to form a mixture of distorted edge and corner-sharing OSr3Ge trigonal pyramids. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two Ge4+ atoms. In the fifteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the sixteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Sr2+ and two Ge4+ atoms. In the seventeenth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom. In the eighteenth O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and one Ge4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrBi5O9 by Materials Project

SrBi5O9 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one SrBi5O9 sheet oriented in the (0, 0, 1) direction. Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share a cornercorner with one BiO5 square pyramid, corners with two equivalent BiO5 trigonal bipyramids, corners with three BiO4 trigonal pyramids, edges with two equivalent SrO6 octahedra, and edges with four equivalent BiO7 pentagonal bipyramids. There are a spread of Sr–O bond distances ranging from 2.54–2.64 Å. There are five inequivalent Bi+3.20+ sites. In the first Bi+3.20+ site, Bi+3.20+ is bonded to four O2- atoms to form BiO4 trigonal pyramids that share corners with two equivalent SrO6 octahedra, a cornercorner with one BiO7 pentagonal bipyramid, and corners with six BiO4 trigonal pyramids. The corner-sharing octahedral tilt angles are 65°. There are a spread of Bi–O bond distances ranging from 2.08–2.35 Å. In the second Bi+3.20+ site, Bi+3.20+ is bonded to five O2- atoms to form distorted BiO5 square pyramids that share a cornercorner with one SrO6 octahedra, corners with four equivalent BiO5 trigonal bipyramids, edges with two equivalent BiO7 pentagonal bipyramids, and edges with two equivalent BiO5 square pyramids. The corner-sharing octahedral tilt angles are 63°. There are a spread of Bi–O bond distances ranging from 2.13–2.46 Å. In the third Bi+3.20+ site, Bi+3.20+ is bonded to seven O2- atoms to form distorted BiO7 pentagonal bipyramids that share corners with three BiO4 trigonal pyramids, edges with four equivalent SrO6 octahedra, edges with two equivalent BiO7 pentagonal bipyramids, edges with two equivalent BiO5 square pyramids, and an edgeedge with one BiO5 trigonal bipyramid. There are a spread of Bi–O bond distances ranging from 2.37–2.70 Å. In the fourth Bi+3.20+ site, Bi+3.20+ is bonded to five O2- atoms to form BiO5 trigonal bipyramids that share corners with two equivalent SrO6 octahedra, corners with four equivalent BiO5 square pyramids, corners with two equivalent BiO5 trigonal bipyramids, and an edgeedge with one BiO7 pentagonal bipyramid. The corner-sharing octahedra tilt angles range from 63–64°. There are a spread of Bi–O bond distances ranging from 2.14–2.28 Å. In the fifth Bi+3.20+ site, Bi+3.20+ is bonded to four O2- atoms to form BiO4 trigonal pyramids that share a cornercorner with one SrO6 octahedra, corners with two equivalent BiO7 pentagonal bipyramids, and corners with six BiO4 trigonal pyramids. The corner-sharing octahedral tilt angles are 71°. There are a spread of Bi–O bond distances ranging from 2.10–2.31 Å. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Bi+3.20+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Sr2+ and two Bi+3.20+ atoms. In the third O2- site, O2- is bonded to one Sr2+ and three Bi+3.20+ atoms to form OSrBi3 tetrahedra that share corners with nine OSrBi3 tetrahedra and edges with three OBi4 tetrahedra. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to three Bi+3.20+ atoms. In the fifth O2- site, O2- is bonded to four Bi+3.20+ atoms to form OBi4 tetrahedra that share corners with four OBi4 tetrahedra and edges with three OSrBi3 tetrahedra. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Bi+3.20+ atoms. In the seventh O2- site, O2- is bonded to one Sr2+ and three Bi+3.20+ atoms to form a mixture of distorted corner and edge-sharing OSrBi3 tetrahedra. In the eighth O2- site, O2- is bonded in a trigonal planar geometry to three Bi+3.20+ atoms. In the ninth O2- site, O2- is bonded to two equivalent Sr2+ and two Bi+3.20+ atoms to form OSr2Bi2 tetrahedra that share corners with six OSrBi3 tetrahedra and edges with three OBi4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr3(AsO4)2 by Materials Project

Sr3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to five O2- atoms to form distorted SrO5 trigonal bipyramids that share corners with five AsO4 tetrahedra, a cornercorner with one SrO5 trigonal bipyramid, an edgeedge with one SrO6 octahedra, and an edgeedge with one SrO5 trigonal bipyramid. There are a spread of Sr–O bond distances ranging from 2.43–2.52 Å. In the second Sr2+ site, Sr2+ is bonded to five O2- atoms to form SrO5 trigonal bipyramids that share corners with two equivalent SrO6 octahedra, corners with five AsO4 tetrahedra, a cornercorner with one SrO5 trigonal bipyramid, and an edgeedge with one SrO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 66–76°. There are a spread of Sr–O bond distances ranging from 2.35–2.52 Å. In the third Sr2+ site, Sr2+ is bonded to six O2- atoms to form distorted SrO6 octahedra that share corners with four AsO4 tetrahedra, corners with two equivalent SrO5 trigonal bipyramids, an edgeedge with one SrO6 octahedra, an edgeedge with one AsO4 tetrahedra, and an edgeedge with one SrO5 trigonal bipyramid. There are a spread of Sr–O bond distances ranging from 2.45–2.78 Å. There are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share corners with three equivalent SrO6 octahedra and corners with five SrO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 47–55°. There is one shorter (1.72 Å) and three longer (1.73 Å) As–O bond length. In the second As5+ site, As5+ is bonded to four O2- atoms to form AsO4 tetrahedra that share a cornercorner with one SrO6 octahedra, corners with five SrO5 trigonal bipyramids, and an edgeedge with one SrO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are a spread of As–O bond distances ranging from 1.71–1.73 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one As5+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one As5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one As5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Sr2+ and one As5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Sr2+ and one As5+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Sr2+ and one As5+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and one As5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrMg14AlO16 by Materials Project

SrMg14AlO16 is Caswellsilverite-derived structured and crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. Sr is bonded to six O atoms to form SrO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent AlO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Sr–O bond distances ranging from 2.22–2.44 Å. There are seven inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent AlO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Mg–O bond distances ranging from 2.09–2.31 Å. In the second Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with four MgO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.00 Å) and four longer (2.22 Å) Mg–O bond lengths. In the third Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, edges with two equivalent AlO6 octahedra, and edges with eight MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–11°. There are a spread of Mg–O bond distances ranging from 2.08–2.23 Å. In the fourth Mg site, Mg is bonded to six O atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–3°. There are a spread of Mg–O bond distances ranging from 2.14–2.22 Å. In the fifth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent AlO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. There are a spread of Mg–O bond distances ranging from 2.15–2.22 Å. In the sixth Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six MgO6 octahedra, edges with two equivalent SrO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. There are a spread of Mg–O bond distances ranging from 2.09–2.27 Å. In the seventh Mg site, Mg is bonded to six O atoms to form MgO6 octahedra that share corners with six equivalent MgO6 octahedra, an edgeedge with one SrO6 octahedra, an edgeedge with one AlO6 octahedra, and edges with ten MgO6 octahedra. The corner-sharing octahedra tilt angles range from 2–13°. There are a spread of Mg–O bond distances ranging from 2.11–2.27 Å. Al is bonded to six O atoms to form AlO6 octahedra that share corners with two equivalent SrO6 octahedra, corners with two equivalent MgO6 octahedra, corners with two equivalent AlO6 octahedra, and edges with twelve MgO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Al–O bond distances ranging from 1.86–2.22 Å. There are ten inequivalent O sites. In the first O site, O is bonded to five Mg and one Al atom to form OMg5Al octahedra that share corners with six OMg5Al octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–7°. In the second O site, O is bonded to one Sr and five Mg atoms to form OSrMg5 octahedra that share corners with six OMg5Al octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the third O site, O is bonded to one Sr and five Mg atoms to form OSrMg5 octahedra that share corners with six OMg5Al octahedra and edges with twelve OMg6 octahedra. The corner-sharing octahedra tilt angles range from 0–5°. There are two shorter (2.19 Å) and two longer (2.22 Å) O–Mg bond lengths. In the fourth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six equivalent OMg6 octahedra and edges with twelve OMg5Al octahedra. The corner-sharing octahedra tilt angles range from 0–5°. In the fifth O site, O is bonded to four Mg and two equivalent Al atoms to form OMg4Al2 octahedra that share corners with six OMg4Al2 octahedra and edges with twelve OMg5Al octahedra. The corner-sharing octahedral tilt angles are 0°. In the sixth O site, O is bonded to two equivalent Sr and four Mg atoms to form OSr2Mg4 octahedra that share corners with six OMg4Al2 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the seventh O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OMg4Al2 octahedra and edges with twelve OMg5Al octahedra. The corner-sharing octahedral tilt angles are 0°. In the eighth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OSr2Mg4 octahedra and edges with twelve OSrMg5 octahedra. The corner-sharing octahedral tilt angles are 0°. In the ninth O site, O is bonded to one Sr, four Mg, and one Al atom to form OSrMg4Al octahedra that share corners with six OSrMg4Al octahedra and edges with twelve OMg5Al octahedra. The corner-sharing octahedra tilt angles range from 0–11°. In the tenth O site, O is bonded to six Mg atoms to form OMg6 octahedra that share corners with six OSrMg4Al octahedra and edges with twelve OMg5Al octahedra. The corner-sharing octahedra tilt angles range from 0–7°.

36 MATERIALS SCIENCE↗