Materials Data on Li2SiSnS4 by Materials Project

Abstract

Li2SnSiS4 crystallizes in the tetragonal I-42m space group. The structure is three-dimensional. Li1+ is bonded to four equivalent S2- atoms to form distorted LiS4 trigonal pyramids that share corners with four equivalent SiS4 tetrahedra and corners with four equivalent LiS4 trigonal pyramids. All Li–S bond lengths are 2.45 Å. Sn2+ is bonded in a 8-coordinate geometry to eight equivalent S2- atoms. There are four shorter (3.07 Å) and four longer (3.17 Å) Sn–S bond lengths. Si4+ is bonded to four equivalent S2- atoms to form SiS4 tetrahedra that share corners with eight equivalent LiS4 trigonal pyramids. All Si–S bond lengths are 2.14 Å. S2- is bonded in a 3-coordinate geometry to two equivalent Li1+, two equivalent Sn2+, and one Si4+ atom.