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DOE OSTI2020

Materials Data on Mg(BO4)4 by Materials Project

Mg(B2O7)2O2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four hydrogen peroxide molecules and one Mg(B2O7)2 framework. In the Mg(B2O7)2 framework, Mg is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Mg–O bond distances ranging from 1.92–2.36 Å. There are four inequivalent B sites. In the first B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.34–1.46 Å. In the second B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.30–1.47 Å. In the third B site, B is bonded in a trigonal planar geometry to three O atoms. There is two shorter (1.36 Å) and one longer (1.41 Å) B–O bond length. In the fourth B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.29–1.47 Å. There are fifteen inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two O atoms. There is one shorter (1.31 Å) and one longer (1.48 Å) O–O bond length. In the second O site, O is bonded in a bent 150 degrees geometry to one Mg and one B atom. In the third O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the fourth O site, O is bonded in a 2-coordinate geometry to one Mg, one B, and one O atom. The O–O bond length is 1.77 Å. In the fifth O site, O is bonded in a distorted bent 120 degrees geometry to two B atoms. In the sixth O site, O is bonded in a distorted single-bond geometry to one B and one O atom. In the seventh O site, O is bonded in a distorted single-bond geometry to one B and one O atom. The O–O bond length is 1.34 Å. In the eighth O site, O is bonded in a bent 120 degrees geometry to two O atoms. The O–O bond length is 1.74 Å. In the ninth O site, O is bonded in a linear geometry to two equivalent O atoms. In the tenth O site, O is bonded in a linear geometry to two equivalent O atoms. In the eleventh O site, O is bonded in a linear geometry to one Mg and one B atom. In the twelfth O site, O is bonded in a distorted single-bond geometry to one B and one O atom. The O–O bond length is 1.33 Å. In the thirteenth O site, O is bonded in a distorted trigonal planar geometry to one Mg and two B atoms. In the fourteenth O site, O is bonded in a single-bond geometry to one O atom. In the fifteenth O site, O is bonded in a bent 120 degrees geometry to one Mg and one O atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(BO4)4 by Materials Project

(MgB4O15)2O2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four water molecules and one MgB4O15 framework. In the MgB4O15 framework, Mg is bonded to five O atoms to form distorted MgO5 trigonal bipyramids that share a cornercorner with one BO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.02–2.28 Å. There are four inequivalent B sites. In the first B site, B is bonded to four O atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.55 Å. In the second B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.37–1.39 Å. In the third B site, B is bonded to four O atoms to form BO4 tetrahedra that share a cornercorner with one BO4 tetrahedra and a cornercorner with one MgO5 trigonal bipyramid. There are a spread of B–O bond distances ranging from 1.44–1.50 Å. In the fourth B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.35–1.40 Å. There are sixteen inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.24 Å. In the second O site, O is bonded in a single-bond geometry to one Mg atom. In the third O site, O is bonded in a bent 120 degrees geometry to one Mg and one O atom. In the fourth O site, O is bonded in a single-bond geometry to one B atom. In the fifth O site, O is bonded in a single-bond geometry to one Mg atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to two B atoms. In the seventh O site, O is bonded in a single-bond geometry to one B atom. In the eighth O site, O is bonded in a single-bond geometry to one Mg atom. In the ninth O site, O is bonded in a bent 120 degrees geometry to two B and one O atom. The O–O bond length is 1.69 Å. In the tenth O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the eleventh O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the twelfth O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the thirteenth O site, O is bonded in a linear geometry to two equivalent O atoms. In the fourteenth O site, O is bonded in a distorted rectangular see-saw-like geometry to four O atoms. There is two shorter (1.87 Å) and two longer (1.89 Å) O–O bond length. In the fifteenth O site, O is bonded in a single-bond geometry to one B and one O atom. In the sixteenth O site, O is bonded in a distorted bent 120 degrees geometry to one Mg, one B, and one O atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg3Mn5(BO4)4 by Materials Project

Mg3Mn5(BO4)4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three MnO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with two equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–66°. There are a spread of Mg–O bond distances ranging from 2.03–2.34 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three MnO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with two equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 54–66°. There are a spread of Mg–O bond distances ranging from 2.02–2.33 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three MnO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with two equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 56–67°. There are a spread of Mg–O bond distances ranging from 2.04–2.35 Å. There are five inequivalent Mn+2.80+ sites. In the first Mn+2.80+ site, Mn+2.80+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–67°. There are a spread of Mn–O bond distances ranging from 2.07–2.37 Å. In the second Mn+2.80+ site, Mn+2.80+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share a cornercorner with one MnO6 octahedra, corners with two equivalent MgO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–67°. There are a spread of Mn–O bond distances ranging from 1.95–2.42 Å. In the third Mn+2.80+ site, Mn+2.80+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with three MgO6 octahedra and edges with six MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–66°. There are a spread of Mn–O bond distances ranging from 1.93–2.43 Å. In the fourth Mn+2.80+ site, Mn+2.80+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with three MgO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 54–66°. There are a spread of Mn–O bond distances ranging from 1.94–2.40 Å. In the fifth Mn+2.80+ site, Mn+2.80+ is bonded to six O2- atoms to form MnO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with two equivalent MnO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with four MnO6 octahedra. The corner-sharing octahedra tilt angles range from 56–67°. There are a spread of Mn–O bond distances ranging from 1.93–2.38 Å. There are four inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.35–1.41 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.35–1.41 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.35 Å) and two longer (1.41 Å) B–O bond length. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.35 Å) and two longer (1.40 Å) B–O bond length. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded to four Mn+2.80+ atoms to form distorted OMn4 tetrahedra that share corners with two equivalent OMn4 tetrahedra and edges with two equivalent OMgMn3 tetrahedra. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mg2+ and one B3+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Mg2+, one Mn+2.80+, and one B3+ atom. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to three Mn+2.80+ and one B3+ atom. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two equivalent Mn+2.80+, and one B3+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Mn+2.80+ and one B3+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mg2+ and one B3+ atom. In the eighth O2- site, O2- is bonded to one Mg2+ and three Mn+2.80+ atoms to form a mixture of distorted edge and corner-sharing OMgMn3 tetrahedra. In the ninth O2- site, O2- is bonded to one Mg2+ and three Mn+2.80+ atoms to form a mixture of distorted edge and corner-sharing OMgMn3 tetrahedra. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mg2+ and one B3+ atom. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Mg2+, one Mn+2.80+, and one B3+ atom. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two equivalent Mn+2.80+, and one B3+ atom. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two equivalent Mn+2.80+, and one B3+ atom. In the fourteenth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Mg2+, one Mn+2.80+, and one B3+ atom. In the fifteenth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mn+2.80+ and one B3+ atom. In the sixteenth O2- site, O2- is bonded to one Mg2+ and three Mn+2.80+ atoms to form distorted OMgMn3 tetrahedra that share corners with two equivalent OMgMn3 tetrahedra and edges with two equivalent OMn4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgB6H14O17 by Materials Project

MgB6(H3O4)4H2O crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional and consists of four water molecules and one MgB6(H3O4)4 framework. In the MgB6(H3O4)4 framework, there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.06–2.18 Å. In the second Mg2+ site, Mg2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Mg–O bond distances ranging from 2.07–2.14 Å. There are six inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 59°. There are a spread of B–O bond distances ranging from 1.46–1.53 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of B–O bond distances ranging from 1.44–1.52 Å. In the third B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There are a spread of B–O bond distances ranging from 1.45–1.53 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. All B–O bond lengths are 1.38 Å. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.38 Å) B–O bond length. In the sixth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.38 Å) B–O bond length. There are twelve inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (0.99 Å) and one longer (1.66 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 0.98 Å. In the fourth 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 fifth 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 sixth 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 seventh 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 eighth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.62 Å) H–O bond length. In the ninth 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 tenth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eleventh 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 twelfth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one B3+, and one H1+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one B3+, and one H1+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+, one B3+, and one H1+ atom. In the ninth O2- site, O2- is bonded in a water-like geometry to one B3+ and one H1+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one B3+ and two H1+ atoms. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to one B3+ and two H1+ atoms. In the twelfth O2- site, O2- is bonded in a trigonal planar geometry to three B3+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fourteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fifteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the sixteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgNiB2P2(H3O4)4 by Materials Project

MgNiB2P2(H3O4)4 crystallizes in the trigonal R32 space group. The structure is three-dimensional. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with two equivalent BO4 tetrahedra and corners with two equivalent PO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.06–2.16 Å. Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with two equivalent BO4 tetrahedra and corners with two equivalent PO4 tetrahedra. There are a spread of Ni–O bond distances ranging from 2.07–2.13 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with two equivalent MgO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There is two shorter (1.47 Å) and two longer (1.50 Å) B–O bond length. In the second B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share corners with two equivalent NiO6 octahedra and corners with two equivalent PO4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There is two shorter (1.47 Å) and two longer (1.50 Å) B–O bond length. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent MgO6 octahedra and corners with two equivalent BO4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There is two shorter (1.53 Å) and two longer (1.57 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent NiO6 octahedra and corners with two equivalent BO4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. There is two shorter (1.53 Å) and two longer (1.57 Å) P–O bond length. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.74 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 1.00 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fifth 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 sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+, one B3+, and one H1+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ni2+, one B3+, and one H1+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one B3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one B3+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one Ni2+, one P5+, and one H1+ atom. In the seventh O2- site, O2- is bonded in a distorted water-like geometry to one Ni2+ and two H1+ atoms. In the eighth O2- site, O2- is bonded in a distorted water-like geometry to one Mg2+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca2Mg2B4O13 by Materials Project

Ca2Mg2B4O13 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.35–2.52 Å. There are three inequivalent Mg sites. In the first Mg site, Mg is bonded to six O atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 14°. There are a spread of Mg–O bond distances ranging from 2.08–2.19 Å. In the second Mg site, Mg is bonded in a distorted hexagonal planar geometry to six O atoms. There are four shorter (2.03 Å) and two longer (2.10 Å) Mg–O bond lengths. In the third Mg site, Mg is bonded to six O atoms to form edge-sharing MgO6 octahedra. There are four shorter (2.11 Å) and two longer (2.37 Å) Mg–O bond lengths. There are three inequivalent B sites. In the first B site, B is bonded to four O atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.44–1.50 Å. In the second B site, B is bonded to four O atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.45–1.49 Å. In the third B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.37–1.39 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a 4-coordinate geometry to one Ca, two Mg, and one B atom. In the second O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the third O site, O is bonded in a distorted bent 120 degrees geometry to one Ca and two B atoms. In the fourth O site, O is bonded in a distorted single-bond geometry to two equivalent Ca and one B atom. In the fifth O site, O is bonded in a distorted bent 120 degrees geometry to one Ca and two B atoms. In the sixth O site, O is bonded in a distorted see-saw-like geometry to two equivalent Ca and two Mg atoms. In the seventh O site, O is bonded in a see-saw-like geometry to two equivalent Ca and two equivalent Mg atoms. In the eighth O site, O is bonded in a distorted single-bond geometry to two equivalent Ca and one B atom. In the ninth O site, O is bonded in a trigonal non-coplanar geometry to one Ca and two Mg atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgB6(H3O4)4 by Materials Project

Mg(H2O)6MgB12(H6O13)2 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two magnesium;hexahydrate molecules and one MgB12(H6O13)2 sheet oriented in the (1, 0, 0) direction. In the MgB12(H6O13)2 sheet, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BO4 tetrahedra. There are a spread of Mg–O bond distances ranging from 2.04–2.18 Å. There are six inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. There are a spread of B–O bond distances ranging from 1.45–1.53 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 60°. There are a spread of B–O bond distances ranging from 1.46–1.54 Å. In the third B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There are a spread of B–O bond distances ranging from 1.45–1.56 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. All B–O bond lengths are 1.38 Å. In the sixth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. There are six 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 distorted single-bond geometry to two O2- atoms. There is one shorter (0.99 Å) and one longer (1.65 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 0.98 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the fifth 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. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are thirteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Mg2+, one B3+, and one H1+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one B3+, and one H1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one B3+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one B3+ and two H1+ atoms. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one H1+ atom. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to three B3+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two B3+ and one H1+ atom. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two B3+ atoms. In the twelfth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the thirteenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg3Ti(BO4)2 by Materials Project

Mg3TiB2O8 crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. there are three inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one MgO6 octahedra, corners with two equivalent TiO6 octahedra, edges with two equivalent MgO6 octahedra, and edges with two equivalent TiO6 octahedra. The corner-sharing octahedra tilt angles range from 61–63°. There are a spread of Mg–O bond distances ranging from 2.01–2.17 Å. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share a cornercorner with one TiO6 octahedra, corners with two equivalent MgO6 octahedra, and edges with four MgO6 octahedra. The corner-sharing octahedra tilt angles range from 48–67°. There are a spread of Mg–O bond distances ranging from 2.04–2.18 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with three MgO6 octahedra, edges with two equivalent TiO6 octahedra, and edges with four MgO6 octahedra. The corner-sharing octahedra tilt angles range from 63–67°. There are a spread of Mg–O bond distances ranging from 2.04–2.18 Å. Ti4+ is bonded to six O2- atoms to form TiO6 octahedra that share corners with three MgO6 octahedra, edges with two equivalent TiO6 octahedra, and edges with four MgO6 octahedra. The corner-sharing octahedra tilt angles range from 48–61°. There are a spread of Ti–O bond distances ranging from 1.81–2.18 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.36–1.42 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.35–1.44 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Mg2+, one Ti4+, and one B3+ atom to form distorted corner-sharing OMg2TiB tetrahedra. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Mg2+ and one B3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mg2+ and one B3+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Mg2+ and one B3+ atom. In the fifth O2- site, O2- is bonded to two Mg2+ and two equivalent Ti4+ atoms to form distorted OMg2Ti2 tetrahedra that share corners with six OMg2TiB tetrahedra and edges with two equivalent OMg3Ti tetrahedra. In the sixth O2- site, O2- is bonded to three Mg2+ and one Ti4+ atom to form distorted OMg3Ti tetrahedra that share corners with three OMg2TiB tetrahedra and edges with two equivalent OMg2Ti2 tetrahedra. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to one Mg2+, two equivalent Ti4+, and one B3+ atom. In the eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Mg2+ and one B3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2MgB12(H4O7)4 by Materials Project

Li2MgB12(H4O7)4 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one Li2MgB12(H4O7)4 sheet oriented in the (1, 0, 0) direction. Li1+ is bonded to four O2- atoms to form distorted LiO4 trigonal pyramids that share a cornercorner with one MgO6 octahedra and a cornercorner with one BO4 tetrahedra. The corner-sharing octahedral tilt angles are 65°. There are a spread of Li–O bond distances ranging from 1.93–2.05 Å. Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six BO4 tetrahedra and corners with two equivalent LiO4 trigonal pyramids. There are a spread of Mg–O bond distances ranging from 2.02–2.36 Å. There are six inequivalent B3+ sites. In the first B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra, corners with two BO4 tetrahedra, and a cornercorner with one LiO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 65°. There are a spread of B–O bond distances ranging from 1.44–1.54 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. In the third B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. There are a spread of B–O bond distances ranging from 1.46–1.52 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.37 Å) and one longer (1.39 Å) B–O bond length. In the fifth B3+ site, B3+ is bonded to four O2- atoms to form BO4 tetrahedra that share a cornercorner with one MgO6 octahedra and corners with two BO4 tetrahedra. The corner-sharing octahedral tilt angles are 60°. There are a spread of B–O bond distances ranging from 1.46–1.53 Å. In the sixth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.36 Å) and two longer (1.38 Å) B–O bond length. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. 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. In the fourth 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 fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth 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 seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Mg2+, one B3+, and one H1+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to one Li1+, one Mg2+, one B3+, and one H1+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Mg2+, one B3+, and one H1+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to three B3+ atoms. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the eleventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one B3+, and one H1+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+, one B3+, and one H1+ atom. In the thirteenth O2- site, O2- is bonded in a bent 120 degrees geometry to one B3+ and one H1+ atom. In the fourteenth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2MgB12(H4O7)4 by Materials Project

Na2MgB12(H4O7)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded in a 4-coordinate geometry to one H1+ and three O2- atoms. The Na–H bond length is 2.17 Å. There are a spread of Na–O bond distances ranging from 2.28–2.41 Å. Mg2+ is bonded in a distorted octahedral geometry to six O2- atoms. There are a spread of Mg–O bond distances ranging from 1.96–2.26 Å. There are six inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.31–1.42 Å. In the second B3+ site, B3+ is bonded to four O2- atoms to form edge-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.47–1.50 Å. In the third B3+ site, B3+ is bonded in a 1-coordinate geometry to two H1+ and one O2- atom. There is one shorter (1.18 Å) and one longer (1.44 Å) B–H bond length. The B–O bond length is 1.26 Å. In the fourth B3+ site, B3+ is bonded to two H1+ and two O2- atoms to form corner-sharing BH2O2 tetrahedra. There is one shorter (1.21 Å) and one longer (1.29 Å) B–H bond length. There is one shorter (1.44 Å) and one longer (1.58 Å) B–O bond length. In the fifth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.30–1.57 Å. In the sixth B3+ site, B3+ is bonded to four O2- atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.43–1.57 Å. There are eight 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 water-like geometry to one Na1+ and one B3+ atom. In the third 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 fourth 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 fifth H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.63 Å) H–O bond length. In the sixth H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.68 Å) H–O bond length. In the seventh H1+ site, H1+ is bonded in a linear geometry to two B3+ atoms. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one B3+ atom. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two B3+ and one H1+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Mg2+ and one H1+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent B3+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one B3+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two B3+ and one H1+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two B3+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two H1+ atoms. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one B3+ atom. In the ninth O2- site, O2- is bonded in a distorted single-bond geometry to one Na1+, one Mg2+, and one B3+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+ and one B3+ atom. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Mg2+ and one B3+ atom. In the thirteenth O2- site, O2- is bonded in a single-bond geometry to one B3+ atom. In the fourteenth O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one B3+, and one H1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg5Nb(BO4)3 by Materials Project

Mg5NbO3(BO3)3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Mg2+ sites. In the first 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 55–68°. There are a spread of Mg–O bond distances ranging from 2.06–2.19 Å. In the second 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 55–66°. There are a spread of Mg–O bond distances ranging from 2.03–2.22 Å. In the third Mg2+ site, Mg2+ is bonded to six O2- atoms to form a mixture of edge and corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 68°. There are a spread of Mg–O bond distances ranging from 2.06–2.19 Å. Nb5+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Nb–O bond distances ranging from 1.91–2.45 Å. There are two inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.36–1.42 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.37–1.42 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two Mg2+, one Nb5+, and one B3+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Mg2+, one Nb5+, and one B3+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Mg2+ and one B3+ atom. In the fourth O2- site, O2- is bonded to three Mg2+ and one Nb5+ atom to form distorted OMg3Nb tetrahedra that share corners with three OMg2NbB tetrahedra and edges with two equivalent OMg3Nb tetrahedra. In the fifth O2- site, O2- is bonded to two equivalent Mg2+, one Nb5+, and one B3+ atom to form distorted corner-sharing OMg2NbB tetrahedra. In the sixth O2- site, O2- is bonded to three Mg2+ and one Nb5+ atom to form a mixture of edge and corner-sharing OMg3Nb tetrahedra. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mg2+ and one B3+ atom. In the eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Mg2+ and one B3+ atom.

36 MATERIALS SCIENCE↗