Materials Data on La2Br5 by Materials Project
La2Br5 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent La+2.50+ sites. In the first La+2.50+ site, La+2.50+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of La–Br bond distances ranging from 3.06–3.56 Å. In the second La+2.50+ site, La+2.50+ is bonded to seven Br1- atoms to form distorted edge-sharing LaBr7 pentagonal bipyramids. There are a spread of La–Br bond distances ranging from 3.03–3.16 Å. There are five inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 3-coordinate geometry to three La+2.50+ atoms. In the second Br1- site, Br1- is bonded in a distorted trigonal non-coplanar geometry to three equivalent La+2.50+ atoms. In the third Br1- site, Br1- is bonded in a distorted trigonal non-coplanar geometry to three equivalent La+2.50+ atoms. In the fourth Br1- site, Br1- is bonded in a distorted T-shaped geometry to three La+2.50+ atoms. In the fifth Br1- site, Br1- is bonded in a distorted L-shaped geometry to three La+2.50+ atoms.