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Materials Data on Ga2H6(SeO4)3 by Materials Project

Ga2H6(SeO4)3 crystallizes in the trigonal R3c space group. The structure is three-dimensional. there are two inequivalent Ga3+ sites. In the first Ga3+ site, Ga3+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (1.98 Å) and three longer (2.03 Å) Ga–O bond lengths. In the second Ga3+ site, Ga3+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (1.96 Å) and three longer (2.05 Å) Ga–O bond lengths. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.73–1.76 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga3+ and one Se4+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga3+ and one Se4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Ga3+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Ga3+ and two H1+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on KDy(SeO4)2 by Materials Project

KDy(SeO4)2 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.63–3.38 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.70–3.29 Å. There are two inequivalent Dy3+ sites. In the first Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.30–2.59 Å. In the second Dy3+ site, Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.26–2.69 Å. There are four inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. All Se–O bond lengths are 1.67 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.69 Å. In the third Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.69 Å. In the fourth Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.67 Å) and one longer (1.68 Å) Se–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent K1+, one Dy3+, and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Dy3+, and one Se6+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Dy3+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one K1+, one Dy3+, and one Se6+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Dy3+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Dy3+ and one Se6+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Dy3+, and one Se6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one Dy3+, and one Se6+ atom. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one Dy3+, and one Se6+ atom. In the tenth O2- site, O2- is bonded in a distorted tetrahedral geometry to two K1+, one Dy3+, and one Se6+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Dy3+, and one Se6+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to two K1+, one Dy3+, and one Se6+ atom. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Dy3+ and one Se6+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to one K1+, one Dy3+, and one Se6+ atom. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one K1+, one Dy3+, and one Se6+ atom. In the sixteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Dy3+ and one Se6+ atom.

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Materials Data on RbAu(SeO4)2 by Materials Project

RbAu(SeO4)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Rb1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Rb–O bond distances ranging from 2.95–3.41 Å. Au5+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Au–O bond lengths are 2.03 Å. Se5+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.64 Å) and two longer (1.75 Å) Se–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Rb1+ and one Se5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Rb1+ and one Se5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Rb1+, one Au5+, and one Se5+ atom.

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Materials Data on UAg2(SeO4)2 by Materials Project

UAg2(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.82–2.46 Å. There are two inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Ag–O bond distances ranging from 2.34–3.14 Å. In the second Ag1+ site, Ag1+ is bonded in a 3-coordinate geometry to six O2- atoms. There are a spread of Ag–O bond distances ranging from 2.31–3.08 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.73–1.77 Å. In the second Se4+ site, Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.72 Å) and two longer (1.74 Å) Se–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one U6+, two equivalent Ag1+, and one Se4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one Ag1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+, one Ag1+, and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+, one Ag1+, and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one U6+, one Ag1+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one U6+, two Ag1+, and one Se4+ atom. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to three Ag1+ and one Se4+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one U6+ and one Ag1+ atom.

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Materials Data on Na2Pd(SeO4)2 by Materials Project

Na2Pd(SeO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.39–2.83 Å. Pd4+ is bonded in a square co-planar geometry to four O2- atoms. All Pd–O bond lengths are 2.04 Å. Se5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.65–1.73 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to one Na1+, one Pd4+, and one Se5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Pd4+, and one Se5+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Na1+ and one Se5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Na1+ and one Se5+ atom.

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Materials Data on NaPr(SeO4)2 by Materials Project

NaPr(SeO4)2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Na1+ is bonded in a 5-coordinate geometry to seven O2- atoms. There are a spread of Na–O bond distances ranging from 2.43–2.93 Å. Pr3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Pr–O bond distances ranging from 2.42–2.84 Å. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.70 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.66 Å) and three longer (1.67 Å) Se–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Pr3+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, one Pr3+, and one Se6+ atom.

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Materials Data on UPb(SeO4)2 by Materials Project

UPb(SeO4)2 crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. U6+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.84–2.52 Å. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pb–O bond distances ranging from 2.42–2.92 Å. In the second Pb2+ site, Pb2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Pb–O bond distances ranging from 2.36–2.96 Å. There are three inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.70 Å) and two longer (1.74 Å) Se–O bond length. In the second Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.76 Å. In the third Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.70 Å) and two longer (1.76 Å) Se–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Pb2+ and one Se4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Pb2+ and one Se4+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+, one Pb2+, and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one U6+, one Pb2+, and one Se4+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one U6+, one Pb2+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one U6+ and one Se4+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one U6+ and one Pb2+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one Pb2+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to one U6+, one Pb2+, and one Se4+ atom.

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Materials Data on BaU(SeO4)2 by Materials Project

BaU(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–2.94 Å. U6+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of U–O bond distances ranging from 1.90–2.36 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.69–1.79 Å. In the second Se4+ site, Se4+ is bonded in a water-like geometry to two O2- atoms. Both Se–O bond lengths are 1.76 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one U6+, and one Se4+ atom. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one U6+ and one Se4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ba2+ and one O2- atom. The O–O bond length is 1.36 Å. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Ba2+, one U6+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one U6+, and one Se4+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one U6+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one Ba2+ and one U6+ atom.

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Materials Data on AlH4(SeO4)2 by Materials Project

AlH4(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Al is bonded in an octahedral geometry to six O atoms. There are a spread of Al–O bond distances ranging from 1.89–1.96 Å. There are two inequivalent H sites. In the first H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.00 Å) and one longer (1.74 Å) H–O bond length. In the second H site, H is bonded in a single-bond geometry to two O atoms. There is one shorter (1.00 Å) and one longer (1.74 Å) H–O bond length. Se is bonded in a trigonal non-coplanar geometry to three O atoms. There are a spread of Se–O bond distances ranging from 1.70–1.73 Å. There are four inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to two H and one Se atom. In the second O site, O is bonded in a distorted trigonal non-coplanar geometry to one Al and two H atoms. In the third O site, O is bonded in a bent 120 degrees geometry to one Al and one Se atom. In the fourth O site, O is bonded in a bent 120 degrees geometry to one Al and one Se atom.

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Materials Data on CuH6(SeO4)2 by Materials Project

CuH6(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Cu2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Cu–O bond distances ranging from 1.95–2.59 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.64 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.72 Å) and one longer (1.82 Å) Se–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Cu2+ and three H1+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one Se4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one H1+ and one Se4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on CoH6(SeO4)2 by Materials Project

CoH6(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Co2+ is bonded in an octahedral geometry to six O2- atoms. There are two shorter (2.09 Å) and four longer (2.13 Å) Co–O bond lengths. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.75 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.72 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.70–1.84 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co2+, one H1+, and one Se4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Co2+, one H1+, and one Se4+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one H1+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Co2+ and two H1+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on ZnH6(SeO4)2 by Materials Project

ZnH6(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Zn2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.11–2.15 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.74 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.68 Å) H–O bond length. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.70–1.84 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Zn2+, one H1+, and one Se4+ atom. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Zn2+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one H1+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Zn2+, one H1+, and one Se4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Y2(SeO4)3 by Materials Project

Y2(SeO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.28–2.57 Å. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.71 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.66 Å) and two longer (1.70 Å) Se–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one Y3+ and one Se6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Y3+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Y3+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Y3+ and one Se6+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Y3+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one Y3+ and one Se6+ atom.

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Materials Data on Dy2(SeO4)3 by Materials Project

Dy2(SeO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Dy3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.27–2.56 Å. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.71 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.66 Å) and two longer (1.70 Å) Se–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one Dy3+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Dy3+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Dy3+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Dy3+ and one Se6+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Dy3+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Dy3+ and one Se6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Ho2(SeO4)3 by Materials Project

Ho2(SeO4)3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ho3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ho–O bond distances ranging from 2.26–2.54 Å. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.66–1.72 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.66 Å) and two longer (1.71 Å) Se–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ho3+ and one Se6+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ho3+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ho3+ and one Se6+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one Se6+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ho3+ and one Se6+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Sc2H6(SeO4)3 by Materials Project

Sc2H6(SeO4)3 crystallizes in the trigonal R3c space group. The structure is three-dimensional. there are two inequivalent Sc3+ sites. In the first Sc3+ site, Sc3+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (2.08 Å) and three longer (2.15 Å) Sc–O bond lengths. In the second Sc3+ site, Sc3+ is bonded in an octahedral geometry to six O2- atoms. There are three shorter (2.05 Å) and three longer (2.23 Å) Sc–O bond lengths. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. Se4+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.72 Å) and two longer (1.74 Å) Se–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one Sc3+ and two H1+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one Sc3+ and one Se4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Sc3+ and one Se4+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Sc3+ and one Se4+ atom.

36 MATERIALS SCIENCE↗

Materials Data on K4H5(SeO4)4 by Materials Project

K4H5(SeO4)4 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent K sites. In the first K site, K is bonded in a 9-coordinate geometry to one H and eight O atoms. The K–H bond length is 2.82 Å. There are a spread of K–O bond distances ranging from 2.78–3.08 Å. In the second K site, K is bonded in a 6-coordinate geometry to six O atoms. There are a spread of K–O bond distances ranging from 2.74–2.97 Å. There are three inequivalent H sites. In the first H site, H is bonded in a distorted linear geometry to two O atoms. There is one shorter (1.02 Å) and one longer (1.61 Å) H–O bond length. In the second H site, H is bonded in a distorted linear geometry to one K and two O atoms. There is one shorter (1.03 Å) and one longer (1.55 Å) H–O bond length. In the third H site, H is bonded in a linear geometry to two equivalent O atoms. Both H–O bond lengths are 1.22 Å. There are two inequivalent Se sites. In the first Se site, Se is bonded in a tetrahedral geometry to four O atoms. There are a spread of Se–O bond distances ranging from 1.65–1.78 Å. In the second Se site, Se is bonded in a tetrahedral geometry to four O atoms. There are a spread of Se–O bond distances ranging from 1.69–1.87 Å. There are eight inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to two K and one Se atom. In the second O site, O is bonded in a distorted single-bond geometry to two K, one H, and one Se atom. In the third O site, O is bonded in a 3-coordinate geometry to two equivalent K and one Se atom. In the fourth O site, O is bonded in a 2-coordinate geometry to one K, one H, and one Se atom. In the fifth O site, O is bonded in a distorted bent 120 degrees geometry to two K, one H, and one Se atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one K, one H, and one Se atom. In the seventh O site, O is bonded in a 1-coordinate geometry to three K and one Se atom. In the eighth O site, O is bonded in a 1-coordinate geometry to one K, one H, and one Se atom.

36 MATERIALS SCIENCE↗

Materials Data on RbLa(SeO4)2 by Materials Project

RbLa(SeO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Rb1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Rb–O bond distances ranging from 2.87–3.49 Å. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.51–2.81 Å. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.64–1.71 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.64–1.71 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent La3+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Rb1+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, two equivalent La3+, and one Se6+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Rb1+, one La3+, and one Se6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one La3+, and one Se6+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent La3+ and one Se6+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Rb1+ and one Se6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to one Rb1+, one La3+, and one Se6+ atom.

36 MATERIALS SCIENCE↗