Materials Data on Li4GeS4 by Materials Project

Abstract

Li4GeS4 is Aluminum carbonitride-like structured and crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are four inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four S2- atoms to form LiS4 tetrahedra that share corners with four equivalent GeS4 tetrahedra, corners with six LiS4 tetrahedra, and an edgeedge with one LiS4 tetrahedra. There are a spread of Li–S bond distances ranging from 2.33–2.50 Å. In the second Li1+ site, Li1+ is bonded to four S2- atoms to form LiS4 tetrahedra that share corners with four equivalent GeS4 tetrahedra, corners with six LiS4 tetrahedra, and an edgeedge with one LiS4 tetrahedra. There are a spread of Li–S bond distances ranging from 2.36–2.46 Å. In the third Li1+ site, Li1+ is bonded to four S2- atoms to form LiS4 tetrahedra that share corners with four LiS4 tetrahedra, corners with four equivalent GeS4 tetrahedra, and edges with two LiS4 tetrahedra. There are a spread of Li–S bond distances ranging from 2.39–2.60 Å. In the fourth Li1+ site, Li1+ is bonded in a 3-coordinate geometry to five S2- atoms. There are a spread of Li–S bond distances ranging from 2.46–3.15 Å. Ge4+ is bonded to four S2- atoms to form GeS4 tetrahedra that share corners with twelve LiS4 tetrahedra. There are a spread of Ge–S bond distances ranging from 2.22–2.26 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to four Li1+ and one Ge4+ atom. In the second S2- site, S2- is bonded in a 6-coordinate geometry to five Li1+ and one Ge4+ atom. In the third S2- site, S2- is bonded in a 6-coordinate geometry to five Li1+ and one Ge4+ atom. In the fourth S2- site, S2- is bonded in a tetrahedral geometry to three Li1+ and one Ge4+ atom.