Materials Data on Li2Mg by Materials Project

Abstract

MgLi2 is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Li is bonded to nine equivalent Li and three equivalent Mg atoms to form LiLi9Mg3 cuboctahedra that share corners with six equivalent MgLi6Mg6 cuboctahedra, corners with twelve equivalent LiLi9Mg3 cuboctahedra, edges with six equivalent MgLi6Mg6 cuboctahedra, edges with twelve equivalent LiLi9Mg3 cuboctahedra, faces with seven equivalent MgLi6Mg6 cuboctahedra, and faces with thirteen equivalent LiLi9Mg3 cuboctahedra. There are three shorter (3.04 Å) and six longer (3.09 Å) Li–Li bond lengths. All Li–Mg bond lengths are 3.10 Å. Mg is bonded to six equivalent Li and six equivalent Mg atoms to form MgLi6Mg6 cuboctahedra that share corners with six equivalent MgLi6Mg6 cuboctahedra, corners with twelve equivalent LiLi9Mg3 cuboctahedra, edges with six equivalent MgLi6Mg6 cuboctahedra, edges with twelve equivalent LiLi9Mg3 cuboctahedra, faces with six equivalent MgLi6Mg6 cuboctahedra, and faces with fourteen equivalent LiLi9Mg3 cuboctahedra. All Mg–Mg bond lengths are 3.09 Å.