Materials Data on La3Sn4 by Materials Project

Abstract

La3Sn4 is Magnesium tetraboride-like structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent La sites. In the first La site, La is bonded in a 8-coordinate geometry to eight Sn atoms. There are a spread of La–Sn bond distances ranging from 3.35–3.46 Å. In the second La site, La is bonded in a 5-coordinate geometry to seven Sn atoms. There are a spread of La–Sn bond distances ranging from 3.24–3.59 Å. There are three inequivalent Sn sites. In the first Sn site, Sn is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Sn atoms. All Sn–Sn bond lengths are 3.18 Å. In the second Sn site, Sn is bonded in a 9-coordinate geometry to six La and three Sn atoms. The Sn–Sn bond length is 2.96 Å. In the third Sn site, Sn is bonded in a 9-coordinate geometry to seven La and two equivalent Sn atoms.