Materials Data on Li15Ge4 by Materials Project

Abstract

Li15Ge4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded in a 3-coordinate geometry to two equivalent Li and three equivalent Ge atoms. There are one shorter (2.76 Å) and one longer (2.81 Å) Li–Li bond lengths. There are a spread of Li–Ge bond distances ranging from 2.64–2.83 Å. In the second Li site, Li is bonded to eight equivalent Li and four equivalent Ge atoms to form distorted LiLi8Ge4 cuboctahedra that share corners with eight equivalent GeLi12 cuboctahedra, edges with eight equivalent LiLi8Ge4 cuboctahedra, and faces with four equivalent GeLi12 cuboctahedra. All Li–Ge bond lengths are 2.89 Å. Ge is bonded to twelve Li atoms to form distorted GeLi12 cuboctahedra that share corners with six equivalent LiLi8Ge4 cuboctahedra, edges with six equivalent GeLi12 cuboctahedra, faces with three equivalent LiLi8Ge4 cuboctahedra, and faces with five equivalent GeLi12 cuboctahedra.