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Materials Data on LaBN2 by Materials Project

LaBN2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 9-coordinate geometry to nine N3- atoms. There are a spread of La–N bond distances ranging from 2.54–3.00 Å. In the second La3+ site, La3+ is bonded in a 8-coordinate geometry to eight N3- atoms. There are a spread of La–N bond distances ranging from 2.40–2.88 Å. In the third La3+ site, La3+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of La–N bond distances ranging from 2.46–2.67 Å. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of B–N bond distances ranging from 1.45–1.50 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of B–N bond distances ranging from 1.45–1.50 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three N3- atoms. There are a spread of B–N bond distances ranging from 1.46–1.49 Å. There are six inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted bent 120 degrees geometry to three La3+ and two B3+ atoms. In the second N3- site, N3- is bonded in a distorted water-like geometry to four La3+ and two B3+ atoms. In the third N3- site, N3- is bonded in a 1-coordinate geometry to four La3+ and one B3+ atom. In the fourth N3- site, N3- is bonded in a distorted single-bond geometry to five La3+ and one B3+ atom. In the fifth N3- site, N3- is bonded in a 1-coordinate geometry to four La3+ and one B3+ atom. In the sixth N3- site, N3- is bonded in a distorted bent 120 degrees geometry to three La3+ and two B3+ atoms.

36 MATERIALS SCIENCE↗

Materials Data on La3(BN2)2 by Materials Project

La3(B2N4) crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent La2+ sites. In the first La2+ site, La2+ is bonded to six equivalent N3- atoms to form distorted edge-sharing LaN6 pentagonal pyramids. There are two shorter (2.54 Å) and four longer (2.61 Å) La–N bond lengths. In the second La2+ site, La2+ is bonded in a body-centered cubic geometry to eight equivalent N3- atoms. All La–N bond lengths are 2.73 Å. B3+ is bonded in a bent 120 degrees geometry to two equivalent N3- atoms. Both B–N bond lengths are 1.48 Å. N3- is bonded in a distorted single-bond geometry to five La2+ and one B3+ atom.

36 MATERIALS SCIENCE↗

Materials Data on La5(BN3)2 by Materials Project

La5(BN3)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent La+2.40+ sites. In the first La+2.40+ site, La+2.40+ is bonded in a 6-coordinate geometry to six N3- atoms. There are a spread of La–N bond distances ranging from 2.49–2.82 Å. In the second La+2.40+ site, La+2.40+ is bonded to seven N3- atoms to form distorted LaN7 pentagonal bipyramids that share corners with two equivalent LaN6 octahedra, edges with three equivalent LaN6 octahedra, edges with two equivalent LaN7 pentagonal bipyramids, and faces with two equivalent LaN7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 5°. There are a spread of La–N bond distances ranging from 2.51–2.79 Å. In the third La+2.40+ site, La+2.40+ is bonded to six N3- atoms to form LaN6 octahedra that share corners with four equivalent LaN7 pentagonal bipyramids, edges with two equivalent LaN6 octahedra, and edges with six equivalent LaN7 pentagonal bipyramids. There are two shorter (2.49 Å) and four longer (2.65 Å) La–N bond lengths. B3+ is bonded in a bent 120 degrees geometry to two N3- atoms. Both B–N bond lengths are 1.48 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a 1-coordinate geometry to five La+2.40+ and one B3+ atom. In the second N3- site, N3- is bonded to six La+2.40+ atoms to form a mixture of edge and corner-sharing NLa6 octahedra. The corner-sharing octahedral tilt angles are 0°. In the third N3- site, N3- is bonded in a distorted single-bond geometry to five La+2.40+ and one B3+ atom.

36 MATERIALS SCIENCE↗