Materials Data on La5C2Br9 by Materials Project
La5C2Br9 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are four inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 8-coordinate geometry to two C3- and six Br1- atoms. There are one shorter (2.51 Å) and one longer (2.52 Å) La–C bond lengths. There are a spread of La–Br bond distances ranging from 3.08–3.35 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to two C3- and seven Br1- atoms. There are one shorter (2.45 Å) and one longer (2.56 Å) La–C bond lengths. There are a spread of La–Br bond distances ranging from 2.94–3.37 Å. In the third La3+ site, La3+ is bonded in a 5-coordinate geometry to one C3- and four Br1- atoms. The La–C bond length is 2.36 Å. There are a spread of La–Br bond distances ranging from 2.98–3.20 Å. In the fourth La3+ site, La3+ is bonded in a 7-coordinate geometry to one C3- and six Br1- atoms. The La–C bond length is 2.30 Å. There are a spread of La–Br bond distances ranging from 3.11–3.54 Å. There are two inequivalent C3- sites. In the first C3- site, C3- is bonded in a 5-coordinate geometry to four La3+ and one C3- atom. The C–C bond length is 1.47 Å. In the second C3- site, C3- is bonded in a 5-coordinate geometry to four La3+ and one C3- atom. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted see-saw-like geometry to four La3+ atoms. In the second Br1- site, Br1- is bonded in a 3-coordinate geometry to three La3+ atoms. In the third Br1- site, Br1- is bonded in a 3-coordinate geometry to three La3+ atoms. In the fourth Br1- site, Br1- is bonded in an L-shaped geometry to two La3+ atoms. In the fifth Br1- site, Br1- is bonded in a 4-coordinate geometry to four La3+ atoms. In the sixth Br1- site, Br1- is bonded in a distorted trigonal non-coplanar geometry to three La3+ atoms.