Materials Data on Li2CuSn by Materials Project
Li2CuSn is Zintl Phase-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded to four equivalent Cu and six equivalent Sn atoms to form distorted LiCu4Sn6 tetrahedra that share corners with six equivalent LiCu4Sn6 tetrahedra, edges with twelve equivalent LiCu6Sn4 tetrahedra, and faces with sixteen LiCu4Sn6 tetrahedra. All Li–Cu bond lengths are 2.72 Å. All Li–Sn bond lengths are 3.15 Å. In the second Li site, Li is bonded to six equivalent Cu and four equivalent Sn atoms to form distorted LiCu6Sn4 tetrahedra that share corners with six equivalent LiCu6Sn4 tetrahedra, edges with twelve equivalent LiCu4Sn6 tetrahedra, and faces with sixteen LiCu4Sn6 tetrahedra. All Li–Cu bond lengths are 3.15 Å. All Li–Sn bond lengths are 2.72 Å. Cu is bonded in a 4-coordinate geometry to ten Li and four equivalent Sn atoms. All Cu–Sn bond lengths are 2.72 Å. Sn is bonded in a 4-coordinate geometry to ten Li and four equivalent Cu atoms.