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Materials Data on LiBeH3 by Materials Project

LiBeH3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Li1+ is bonded in a 8-coordinate geometry to eight H1- atoms. There are a spread of Li–H bond distances ranging from 1.95–2.16 Å. Be2+ is bonded to six H1- atoms to form corner-sharing BeH6 octahedra. The corner-sharing octahedra tilt angles range from 24–25°. There are a spread of Be–H bond distances ranging from 1.60–1.62 Å. There are two inequivalent H1- sites. In the first H1- site, H1- is bonded in a distorted square co-planar geometry to two equivalent Li1+ and two equivalent Be2+ atoms. In the second H1- site, H1- is bonded to three equivalent Li1+ and two equivalent Be2+ atoms to form a mixture of distorted edge and corner-sharing HLi3Be2 trigonal bipyramids.

36 MATERIALS SCIENCE↗

Materials Data on LiBeH3 by Materials Project

LiBeH3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 6-coordinate geometry to seven H1- atoms. There are a spread of Li–H bond distances ranging from 1.92–2.28 Å. In the second Li1+ site, Li1+ is bonded to six H1- atoms to form distorted LiH6 octahedra that share corners with five BeH4 tetrahedra and an edgeedge with one BeH4 tetrahedra. There are a spread of Li–H bond distances ranging from 1.90–2.14 Å. In the third Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.88–2.05 Å. There are three inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share corners with three equivalent LiH6 octahedra and corners with two BeH4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–63°. There are a spread of Be–H bond distances ranging from 1.41–1.44 Å. In the second Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share a cornercorner with one LiH6 octahedra and corners with two BeH4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Be–H bond distances ranging from 1.39–1.45 Å. In the third Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share a cornercorner with one LiH6 octahedra, corners with two BeH4 tetrahedra, and an edgeedge with one LiH6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are a spread of Be–H bond distances ranging from 1.42–1.45 Å. There are nine inequivalent H1- sites. In the first H1- site, H1- is bonded in a distorted bent 120 degrees geometry to one Li1+ and two Be2+ atoms. In the second H1- site, H1- is bonded in a 3-coordinate geometry to one Li1+ and two Be2+ atoms. In the third H1- site, H1- is bonded in a distorted trigonal planar geometry to one Li1+ and two Be2+ atoms. In the fourth H1- site, H1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Be2+ atom. In the fifth H1- site, H1- is bonded in a trigonal planar geometry to two Li1+ and one Be2+ atom. In the sixth H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form a mixture of edge and corner-sharing HLi3Be tetrahedra. In the seventh H1- site, H1- is bonded in a distorted rectangular see-saw-like geometry to three Li1+ and one Be2+ atom. In the eighth H1- site, H1- is bonded in a 3-coordinate geometry to two Li1+ and one Be2+ atom. In the ninth H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form a mixture of distorted edge and corner-sharing HLi3Be tetrahedra.

36 MATERIALS SCIENCE↗

Materials Data on LiBeH3 by Materials Project

LiBeH3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to five H1- atoms to form distorted LiH5 trigonal bipyramids that share corners with four BeH4 tetrahedra, corners with four equivalent LiH4 trigonal pyramids, and an edgeedge with one BeH4 tetrahedra. There are a spread of Li–H bond distances ranging from 1.86–2.08 Å. In the second Li1+ site, Li1+ is bonded to four H1- atoms to form LiH4 trigonal pyramids that share corners with four BeH4 tetrahedra and corners with four equivalent LiH5 trigonal bipyramids. There are a spread of Li–H bond distances ranging from 1.85–1.91 Å. There are two inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share corners with two equivalent BeH4 tetrahedra, corners with three equivalent LiH5 trigonal bipyramids, and corners with two equivalent LiH4 trigonal pyramids. There is two shorter (1.42 Å) and two longer (1.45 Å) Be–H bond length. In the second Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share corners with two equivalent BeH4 tetrahedra, a cornercorner with one LiH5 trigonal bipyramid, corners with two equivalent LiH4 trigonal pyramids, and an edgeedge with one LiH5 trigonal bipyramid. There is two shorter (1.42 Å) and two longer (1.44 Å) Be–H bond length. There are six inequivalent H1- sites. In the first H1- site, H1- is bonded in a trigonal non-coplanar geometry to two Li1+ and one Be2+ atom. In the second H1- site, H1- is bonded in a trigonal planar geometry to two Li1+ and one Be2+ atom. In the third H1- site, H1- is bonded in a trigonal planar geometry to two Li1+ and one Be2+ atom. In the fourth H1- site, H1- is bonded in a distorted trigonal non-coplanar geometry to two Li1+ and one Be2+ atom. In the fifth H1- site, H1- is bonded in a 3-coordinate geometry to one Li1+ and two Be2+ atoms. In the sixth H1- site, H1- is bonded in a bent 120 degrees geometry to two Be2+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Li2BeH4 by Materials Project

Li2BeH4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twelve inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four H1- atoms. There are a spread of Li–H bond distances ranging from 1.73–1.94 Å. In the second Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.81–2.21 Å. In the third Li1+ site, Li1+ is bonded in a distorted T-shaped geometry to three H1- atoms. There are a spread of Li–H bond distances ranging from 1.75–1.95 Å. In the fourth Li1+ site, Li1+ is bonded in a water-like geometry to two H1- atoms. There is one shorter (1.89 Å) and one longer (1.97 Å) Li–H bond length. In the fifth Li1+ site, Li1+ is bonded in a 3-coordinate geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.91–2.28 Å. In the sixth Li1+ site, Li1+ is bonded in a 4-coordinate geometry to four H1- atoms. There are a spread of Li–H bond distances ranging from 1.82–2.13 Å. In the seventh Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.85–2.09 Å. In the eighth Li1+ site, Li1+ is bonded in a distorted rectangular see-saw-like geometry to four H1- atoms. There are a spread of Li–H bond distances ranging from 1.85–2.08 Å. In the ninth Li1+ site, Li1+ is bonded in an L-shaped geometry to two H1- atoms. There is one shorter (1.76 Å) and one longer (1.93 Å) Li–H bond length. In the tenth Li1+ site, Li1+ is bonded in a distorted trigonal pyramidal geometry to four H1- atoms. There are a spread of Li–H bond distances ranging from 1.84–2.01 Å. In the eleventh Li1+ site, Li1+ is bonded in a distorted trigonal bipyramidal geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.94–2.08 Å. In the twelfth Li1+ site, Li1+ is bonded in a rectangular see-saw-like geometry to four H1- atoms. There are a spread of Li–H bond distances ranging from 1.82–1.91 Å. There are six inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded in an L-shaped geometry to two H1- atoms. There is one shorter (1.50 Å) and one longer (1.54 Å) Be–H bond length. In the second Be2+ site, Be2+ is bonded in a single-bond geometry to one H1- atom. The Be–H bond length is 1.47 Å. In the third Be2+ site, Be2+ is bonded in a distorted trigonal non-coplanar geometry to three H1- atoms. There are a spread of Be–H bond distances ranging from 1.42–1.61 Å. In the fourth Be2+ site, Be2+ is bonded in a tetrahedral geometry to four H1- atoms. There are a spread of Be–H bond distances ranging from 1.41–1.59 Å. In the fifth Be2+ site, Be2+ is bonded in a trigonal non-coplanar geometry to three H1- atoms. There are a spread of Be–H bond distances ranging from 1.43–1.48 Å. In the sixth Be2+ site, Be2+ is bonded in a trigonal non-coplanar geometry to three H1- atoms. There are a spread of Be–H bond distances ranging from 1.42–1.49 Å. There are twenty-four inequivalent H1- sites. In the first H1- site, H1- is bonded in a rectangular see-saw-like geometry to four Li1+ atoms. In the second H1- site, H1- is bonded to four Li1+ atoms to form edge-sharing HLi4 tetrahedra. In the third H1- site, H1- is bonded in a 3-coordinate geometry to two Li1+ and one Be2+ atom. In the fourth H1- site, H1- is bonded in a distorted trigonal pyramidal geometry to three Li1+ and one Be2+ atom. In the fifth H1- site, H1- is bonded in a distorted bent 120 degrees geometry to one Li1+ and one H1- atom. The H–H bond length is 0.76 Å. In the sixth H1- site, H1- is bonded in a distorted L-shaped geometry to one Li1+ and one H1- atom. The H–H bond length is 0.76 Å. In the seventh H1- site, H1- is bonded in a T-shaped geometry to three Be2+ atoms. In the eighth H1- site, H1- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and two Be2+ atoms. In the ninth H1- site, H1- is bonded in a 3-coordinate geometry to two Li1+ and one H1- atom. The H–H bond length is 0.80 Å. In the tenth H1- site, H1- is bonded in a 3-coordinate geometry to two Li1+ and one H1- atom. The H–H bond length is 0.77 Å. In the eleventh H1- site, H1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Be2+ atom. In the twelfth H1- site, H1- is bonded in a 3-coordinate geometry to two Li1+ and one Be2+ atom. In the thirteenth H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form edge-sharing HLi3Be tetrahedra. In the fourteenth H1- site, H1- is bonded in a trigonal non-coplanar geometry to two Li1+ and one Be2+ atom. In the fifteenth H1- site, H1- is bonded in a distorted T-shaped geometry to two Li1+ and one Be2+ atom. In the sixteenth H1- site, H1- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and two Be2+ atoms. In the seventeenth H1- site, H1- is bonded in a distorted T-shaped geometry to two Li1+ and one Be2+ atom. In the eighteenth H1- site, H1- is bonded in a distorted trigonal non-coplanar geometry to two Li1+ and one Be2+ atom. In the nineteenth H1- site, H1- is bonded in a 3-coordinate geometry to three Li1+ atoms. In the twentieth H1- site, H1- is bonded in a 4-coordinate geometry to four Li1+ atoms. In the twenty-first H1- site, H1- is bonded in a distorted L-shaped geometry to one Li1+ and one H1- atom. In the twenty-second H1- site, H1- is bonded in a single-bond geometry to one H1- atom. In the twenty-third H1- site, H1- is bonded in a 1-coordinate geometry to two Li1+ and one H1- atom. In the twenty-fourth H1- site, H1- is bonded in a distorted single-bond geometry to one Li1+ and one H1- atom.

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Materials Data on LiBeH3 by Materials Project

LiBeH3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five H1- atoms. There are a spread of Li–H bond distances ranging from 1.88–2.05 Å. In the second Li1+ site, Li1+ is bonded in a 7-coordinate geometry to seven H1- atoms. There are a spread of Li–H bond distances ranging from 1.92–2.27 Å. In the third Li1+ site, Li1+ is bonded to six H1- atoms to form distorted LiH6 octahedra that share corners with five BeH4 tetrahedra and an edgeedge with one BeH4 tetrahedra. There are a spread of Li–H bond distances ranging from 1.89–2.16 Å. There are three inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share corners with three equivalent LiH6 octahedra and corners with two BeH4 tetrahedra. The corner-sharing octahedra tilt angles range from 46–63°. There are a spread of Be–H bond distances ranging from 1.41–1.45 Å. In the second Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share a cornercorner with one LiH6 octahedra and corners with two BeH4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Be–H bond distances ranging from 1.39–1.44 Å. In the third Be2+ site, Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share a cornercorner with one LiH6 octahedra, corners with two BeH4 tetrahedra, and an edgeedge with one LiH6 octahedra. The corner-sharing octahedral tilt angles are 51°. There are a spread of Be–H bond distances ranging from 1.42–1.45 Å. There are nine inequivalent H1- sites. In the first H1- site, H1- is bonded in a trigonal planar geometry to two Li1+ and one Be2+ atom. In the second H1- site, H1- is bonded in a 3-coordinate geometry to one Li1+ and two Be2+ atoms. In the third H1- site, H1- is bonded in a 4-coordinate geometry to two Li1+ and one Be2+ atom. In the fourth H1- site, H1- is bonded in a 2-coordinate geometry to one Li1+ and two Be2+ atoms. In the fifth H1- site, H1- is bonded in a distorted trigonal planar geometry to one Li1+ and two Be2+ atoms. In the sixth H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form a mixture of distorted edge and corner-sharing HLi3Be trigonal pyramids. In the seventh H1- site, H1- is bonded in a distorted rectangular see-saw-like geometry to three Li1+ and one Be2+ atom. In the eighth H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form a mixture of edge and corner-sharing HLi3Be tetrahedra. In the ninth H1- site, H1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Be2+ atom.

36 MATERIALS SCIENCE↗

Materials Data on Li66Be24H35 by Materials Project

Li66Be24H35 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are sixty-six inequivalent Li sites. In the first Li site, Li is bonded in a distorted single-bond geometry to one Be and one H atom. The Li–Be bond length is 2.37 Å. The Li–H bond length is 1.77 Å. In the second Li site, Li is bonded in a distorted single-bond geometry to three Be and one H atom. There are a spread of Li–Be bond distances ranging from 2.41–2.73 Å. The Li–H bond length is 1.74 Å. In the third Li site, Li is bonded in a water-like geometry to two H atoms. There is one shorter (1.89 Å) and one longer (1.91 Å) Li–H bond length. In the fourth Li site, Li is bonded in a 2-coordinate geometry to two Be atoms. There are one shorter (2.64 Å) and one longer (2.83 Å) Li–Be bond lengths. In the fifth Li site, Li is bonded in a 2-coordinate geometry to one Be and two H atoms. The Li–Be bond length is 2.62 Å. There is one shorter (1.86 Å) and one longer (2.08 Å) Li–H bond length. In the sixth Li site, Li is bonded in a distorted water-like geometry to two H atoms. There is one shorter (1.76 Å) and one longer (1.83 Å) Li–H bond length. In the seventh Li site, Li is bonded in a single-bond geometry to one H atom. The Li–H bond length is 1.81 Å. In the eighth Li site, Li is bonded in a 1-coordinate geometry to two H atoms. There are one shorter (2.01 Å) and one longer (2.23 Å) Li–H bond lengths. In the ninth Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.89–2.05 Å. In the tenth Li site, Li is bonded in a 5-coordinate geometry to five H atoms. There are a spread of Li–H bond distances ranging from 1.92–2.06 Å. In the eleventh Li site, Li is bonded in a distorted water-like geometry to two H atoms. There is one shorter (1.95 Å) and one longer (1.97 Å) Li–H bond length. In the twelfth Li site, Li is bonded in a water-like geometry to two H atoms. There is one shorter (1.87 Å) and one longer (1.93 Å) Li–H bond length. In the thirteenth Li site, Li is bonded in a 2-coordinate geometry to two H atoms. There is one shorter (1.92 Å) and one longer (2.04 Å) Li–H bond length. In the fourteenth Li site, Li is bonded in a distorted bent 120 degrees geometry to two H atoms. There is one shorter (1.81 Å) and one longer (1.88 Å) Li–H bond length. In the fifteenth Li site, Li is bonded in a distorted bent 120 degrees geometry to two H atoms. There is one shorter (1.73 Å) and one longer (1.86 Å) Li–H bond length. In the sixteenth Li site, Li is bonded in a T-shaped geometry to three H atoms. There are a spread of Li–H bond distances ranging from 2.04–2.12 Å. In the seventeenth Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.89–2.12 Å. In the eighteenth Li site, Li is bonded in a 1-coordinate geometry to two H atoms. There are one shorter (1.96 Å) and one longer (2.25 Å) Li–H bond lengths. In the nineteenth Li site, Li is bonded in a distorted L-shaped geometry to two H atoms. There are one shorter (2.07 Å) and one longer (2.10 Å) Li–H bond lengths. In the twentieth Li site, Li is bonded in a distorted trigonal non-coplanar geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.79–2.02 Å. In the twenty-first Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.87–1.98 Å. In the twenty-second Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 2.19 Å. In the twenty-third Li site, Li is bonded in a 4-coordinate geometry to four H atoms. There are a spread of Li–H bond distances ranging from 1.87–2.20 Å. In the twenty-fourth Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.89–2.08 Å. In the twenty-fifth Li site, Li is bonded in a 2-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.99–2.18 Å. In the twenty-sixth Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 2.09 Å. In the twenty-seventh Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.88–2.09 Å. In the twenty-eighth Li site, Li is bonded in a distorted L-shaped geometry to two H atoms. Both Li–H bond lengths are 1.89 Å. In the twenty-ninth Li site, Li is bonded in a 3-coordinate geometry to one Be and three H atoms. The Li–Be bond length is 2.94 Å. There are a spread of Li–H bond distances ranging from 1.83–2.06 Å. In the thirtieth Li site, Li is bonded in a 3-coordinate geometry to one Be and three H atoms. The Li–Be bond length is 2.65 Å. There are a spread of Li–H bond distances ranging from 1.72–1.83 Å. In the thirty-first Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 1.98 Å. In the thirty-second Li site, Li is bonded in a 2-coordinate geometry to one Be and two H atoms. The Li–Be bond length is 2.45 Å. There is one shorter (1.88 Å) and one longer (1.90 Å) Li–H bond length. In the thirty-third Li site, Li is bonded in a distorted water-like geometry to one Be and two H atoms. The Li–Be bond length is 2.48 Å. There are one shorter (1.98 Å) and one longer (2.02 Å) Li–H bond lengths. In the thirty-fourth Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.85–1.87 Å. In the thirty-fifth Li site, Li is bonded in a single-bond geometry to one H atom. The Li–H bond length is 2.17 Å. In the thirty-sixth Li site, Li is bonded in a 2-coordinate geometry to two H atoms. There is one shorter (1.90 Å) and one longer (1.99 Å) Li–H bond length. In the thirty-seventh Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.90–2.26 Å. In the thirty-eighth Li site, Li is bonded in a single-bond geometry to one H atom. The Li–H bond length is 1.72 Å. In the thirty-ninth Li site, Li is bonded in a 3-coordinate geometry to four H atoms. There are a spread of Li–H bond distances ranging from 1.84–2.27 Å. In the fortieth Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 1.82 Å. In the forty-first Li site, Li is bonded in a distorted T-shaped geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.93–2.20 Å. In the forty-second Li site, Li is bonded in a distorted single-bond geometry to two Be and one H atom. There are one shorter (2.44 Å) and one longer (2.48 Å) Li–Be bond lengths. The Li–H bond length is 1.97 Å. In the forty-third Li site, Li is bonded in a single-bond geometry to one Be and one H atom. The Li–Be bond length is 2.66 Å. The Li–H bond length is 1.80 Å. In the forty-fourth Li site, Li is bonded in a single-bond geometry to one Be atom. The Li–Be bond length is 2.38 Å. In the forty-fifth Li site, Li is bonded in a 1-coordinate geometry to two H atoms. There are one shorter (1.82 Å) and one longer (2.24 Å) Li–H bond lengths. In the forty-sixth Li site, Li is bonded in a distorted trigonal planar geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.86–1.94 Å. In the forty-seventh Li site, Li is bonded in a 3-coordinate geometry to three Be atoms. There are a spread of Li–Be bond distances ranging from 2.54–2.71 Å. In the forty-eighth Li site, Li is bonded in a 2-coordinate geometry to two Be atoms. There are one shorter (2.46 Å) and one longer (2.55 Å) Li–Be bond lengths. In the forty-ninth Li site, Li is bonded in a distorted bent 150 degrees geometry to two H atoms. There are one shorter (2.02 Å) and one longer (2.04 Å) Li–H bond lengths. In the fiftieth Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 2.00 Å. In the fifty-first Li site, Li is bonded in a 2-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.89–2.24 Å. In the fifty-second Li site, Li is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Li–H bond distances ranging from 1.96–2.15 Å. In the fifty-third Li site, Li is bonded in a 2-coordinate geometry to two Be atoms. There are one shorter (2.39 Å) and one longer (2.66 Å) Li–Be bond lengths. In the fifty-fourth Li site, Li is bonded in a bent 150 degrees geometry to two H atoms. There is one shorter (1.77 Å) and one longer (1.90 Å) Li–H bond length. In the fifty-fifth Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 1.88 Å. In the fifty-sixth Li site, Li is bonded in an L-shaped geometry to one Be and two H atoms. The Li–Be bond length is 2.80 Å. There is one shorter (1.87 Å) and one longer (1.91 Å) Li–H bond length. In the fifty-seventh Li site, Li is bonded in a bent 150 degrees geometry to two H atoms. There is one shorter (1.80 Å) and one longer (1.81 Å) Li–H bond length. In the fifty-eighth Li site, Li is bonded in a distorted single-bond geometry to one H atom. The Li–H bond length is 1.90 Å. In the fifty-ninth Li site, Li is bonded in a single-bond geometry to one H atom. The Li–H bond length is 1.79 Å. In the sixtieth Li site, Li is bonded in a distorted single-bond geometry to two Be and one H atom. There are one shorter (2.40 Å) and one longer (2.62 Å) Li–Be bond lengths. The Li–H bond length is 1.84 Å. In the sixty-first Li site, Li is bonded in a 1-coordinate geometry to two Be and one H atom. There are one shorter (2.45 Å) and one longer (2.46 Å) Li–Be bond lengths. The Li–H bond length is 2.21 Å. In the sixty-second Li site, Li is bonded in a 1-coordinate geometry to one Be atom. The Li–Be bond length is 2.65 Å. In the sixty-third Li site, Li is bonded in a distorted water-like geometry to two H atoms. There are one shorter (1.93 Å) and one longer (2.08 Å) Li–H bond lengths. In the sixty-fourth Li site, Li is bonded in a distorted single-bond geometry to three Be and one H atom. There are a spread of Li–Be bond distances ranging from 2.51–2.78 Å. The Li–H bond length is 1.87 Å. In the sixty-fifth Li site, Li is bonded in a 6-coordinate geometry to two Be atoms. There are one shorter (2.61 Å) and one longer (2.63 Å) Li–Be bond lengths. In the sixty-sixth Li site, Li is bonded in a water-like geometry to two H atoms. There is one shorter (1.79 Å) and one longer (1.84 Å) Li–H bond length. There are twenty-four inequivalent Be sites. In the first Be site, Be is bonded in a trigonal planar geometry to three H atoms. There are a spread of Be–H bond distances ranging from 1.44–1.46 Å. In the second Be site, Be is bonded in a distorted single-bond geometry to one Li and one H atom. The Be–H bond length is 1.50 Å. In the third Be site, Be is bonded in a distorted bent 120 degrees geometry to one Li and two H atoms. There is one shorter (1.50 Å) and one longer (1.57 Å) Be–H bond length. In the fourth Be site, Be is bonded in a distorted trigonal non-coplanar geometry to three H atoms. There are a spread of Be–H bond distances ranging from 1.44–1.52 Å. In the fifth Be site, Be is bonded in a single-bond geometry to one Li and one H atom. The Be–H bond length is 1.44 Å. In the sixth Be site, Be is bonded in a 9-coordinate geometry to seven Li and two Be atoms. There are one shorter (2.13 Å) and one longer (2.16 Å) Be–Be bond lengths. In the seventh Be site, Be is bonded in a distorted single-bond geometry to two Li and one H atom. The Be–H bond length is 1.49 Å. In the eighth Be site, Be is bonded in a 1-coordinate geometry to seven Li and two Be atoms. There are one shorter (2.22 Å) and one longer (2.49 Å) Be–Be bond lengths. In the ninth Be site, Be is bonded in a single-bond geometry to one Li and one H atom. The Be–H bond length is 1.48 Å. In the tenth Be site, Be is bonded in a 3-coordinate geometry to three H atoms. There are a spread of Be–H

36 MATERIALS SCIENCE↗

Materials Data on LiBeH3 by Materials Project

LiBeH3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a distorted body-centered cubic geometry to eight H1- atoms. There are a spread of Li–H bond distances ranging from 1.98–2.20 Å. In the second Li1+ site, Li1+ is bonded in a distorted body-centered cubic geometry to eight H1- atoms. There are a spread of Li–H bond distances ranging from 1.96–2.23 Å. There are two inequivalent Be2+ sites. In the first Be2+ site, Be2+ is bonded to four H1- atoms to form corner-sharing BeH4 tetrahedra. There is two shorter (1.41 Å) and two longer (1.43 Å) Be–H bond length. In the second Be2+ site, Be2+ is bonded to four H1- atoms to form corner-sharing BeH4 tetrahedra. There is two shorter (1.40 Å) and two longer (1.43 Å) Be–H bond length. There are four inequivalent H1- sites. In the first H1- site, H1- is bonded in a 4-coordinate geometry to three Li1+ and one Be2+ atom. In the second H1- site, H1- is bonded in a 4-coordinate geometry to three Li1+ and one Be2+ atom. In the third H1- site, H1- is bonded in a 2-coordinate geometry to two equivalent Li1+ and two equivalent Be2+ atoms. In the fourth H1- site, H1- is bonded in a 2-coordinate geometry to two equivalent Li1+ and two Be2+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on LiBeH3 by Materials Project

LiBeH3 is Esseneite-derived structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six H1- atoms to form LiH6 octahedra that share corners with six equivalent BeH4 tetrahedra and edges with two equivalent LiH6 octahedra. There are a spread of Li–H bond distances ranging from 1.86–1.96 Å. In the second Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six H1- atoms. There are a spread of Li–H bond distances ranging from 1.92–2.20 Å. Be2+ is bonded to four H1- atoms to form BeH4 tetrahedra that share corners with three equivalent LiH6 octahedra and corners with two equivalent BeH4 tetrahedra. The corner-sharing octahedra tilt angles range from 36–63°. There is two shorter (1.41 Å) and two longer (1.49 Å) Be–H bond length. There are three inequivalent H1- sites. In the first H1- site, H1- is bonded to three Li1+ and one Be2+ atom to form a mixture of distorted edge and corner-sharing HLi3Be tetrahedra. In the second H1- site, H1- is bonded in a distorted T-shaped geometry to two Li1+ and one Be2+ atom. In the third H1- site, H1- is bonded in a 2-coordinate geometry to one Li1+ and two equivalent Be2+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on Li2BeH4 by Materials Project

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

36 MATERIALS SCIENCE↗

Materials Data on LiBeH3 by Materials Project

LiBeH3 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. Li1+ is bonded in a 6-coordinate geometry to six H1- atoms. There are a spread of Li–H bond distances ranging from 1.84–2.19 Å. Be2+ is bonded to four H1- atoms to form corner-sharing BeH4 tetrahedra. There are a spread of Be–H bond distances ranging from 1.40–1.46 Å. There are three inequivalent H1- sites. In the first H1- site, H1- is bonded in a T-shaped geometry to two equivalent Li1+ and one Be2+ atom. In the second H1- site, H1- is bonded in a 4-coordinate geometry to three equivalent Li1+ and one Be2+ atom. In the third H1- site, H1- is bonded in a distorted trigonal non-coplanar geometry to one Li1+ and two equivalent Be2+ atoms.

36 MATERIALS SCIENCE↗