Li2PtSn crystallizes in the cubic F-43m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to four equivalent Pt(1) atoms to form distorted LiPt4 tetrahedra that share corners with twelve equivalent Li(1)Pt4 tetrahedra, corners with twelve equivalent Li(2)Sn4Pt6 tetrahedra, and faces with four equivalent Li(2)Sn4Pt6 tetrahedra. In the second Li site, Li(2) is bonded to six equivalent Pt(1) and four equivalent Sn(1) atoms to form distorted LiSn4Pt6 tetrahedra that share corners with six equivalent Li(2)Sn4Pt6 tetrahedra, corners with twelve equivalent Li(1)Pt4 tetrahedra, faces with four equivalent Li(1)Pt4 tetrahedra, and faces with twelve equivalent Li(2)Sn4Pt6 tetrahedra. Pt(1) is bonded in a 14-coordinate geometry to four equivalent Li(1), six equivalent Li(2), and four equivalent Sn(1) atoms. Sn(1) is bonded in a distorted body-centered cubic geometry to four equivalent Li(2) and four equivalent Pt(1) atoms.
Li2PtSn crystallizes in the cubic F-43m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to four equivalent Pt(1) atoms to form distorted LiPt4 tetrahedra that share corners with twelve equivalent Li(1)Pt4 tetrahedra, corners with twelve equivalent Li(2)Sn4Pt6 tetrahedra, and faces with four equivalent Li(2)Sn4Pt6 tetrahedra. All Li(1)-Pt(1) bond lengths are 2.73 Å. In the second Li site, Li(2) is bonded to six equivalent Pt(1) and four equivalent Sn(1) atoms to form distorted LiSn4Pt6 tetrahedra that share corners with six equivalent Li(2)Sn4Pt6 tetrahedra, corners with twelve equivalent Li(1)Pt4 tetrahedra, faces with four equivalent Li(1)Pt4 tetrahedra, and faces with twelve equivalent Li(2)Sn4Pt6 tetrahedra. All Li(2)-Pt(1) bond lengths are 3.15 Å. All Li(2)-Sn(1) bond lengths are 2.73 Å. Pt(1) is bonded in a 14-coordinate geometry to four equivalent Li(1), six equivalent Li(2), and four equivalent Sn(1) atoms. All Pt(1)-Sn(1) bond lengths are 2.73 Å. Sn(1) is bonded in a distorted body-centered cubic geometry to four equivalent Li(2) and four equivalent Pt(1) atoms.