Materials Data on Li4TiS4 by Materials Project

Abstract

Li4TiS4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two 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 TiS4 tetrahedra, corners with six LiS4 tetrahedra, and edges with three LiS4 tetrahedra. There are two shorter (2.40 Å) and two longer (2.45 Å) Li–S bond lengths. In the second Li1+ site, Li1+ is bonded to four S2- atoms to form LiS4 tetrahedra that share corners with four equivalent TiS4 tetrahedra, corners with six LiS4 tetrahedra, and edges with three LiS4 tetrahedra. There are a spread of Li–S bond distances ranging from 2.51–2.60 Å. Ti4+ is bonded to four S2- atoms to form TiS4 tetrahedra that share corners with sixteen LiS4 tetrahedra. There are two shorter (2.27 Å) and two longer (2.29 Å) Ti–S bond lengths. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded to four Li1+ and one Ti4+ atom to form distorted corner-sharing SLi4Ti trigonal bipyramids. In the second S2- site, S2- is bonded in a 5-coordinate geometry to four Li1+ and one Ti4+ atom.