Materials Data on Li3LaBi2 by Materials Project
Li3LaBi2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. there are two inequivalent Li sites. In the first Li site, Li is bonded to three equivalent Li and four equivalent Bi atoms to form distorted LiLi3Bi4 tetrahedra that share corners with three equivalent LiLi6La2Bi6 cuboctahedra, corners with three equivalent LaLi2Bi6 octahedra, corners with three equivalent LiLi3Bi4 tetrahedra, edges with three equivalent LaLi2Bi6 octahedra, edges with six equivalent LiLi3Bi4 tetrahedra, faces with three equivalent LiLi6La2Bi6 cuboctahedra, faces with three equivalent LaLi2Bi6 octahedra, and faces with three equivalent LiLi3Bi4 tetrahedra. The corner-sharing octahedral tilt angles are 20°. All Li–Li bond lengths are 2.97 Å. There are three shorter (2.86 Å) and one longer (2.98 Å) Li–Bi bond lengths. In the second Li site, Li is bonded to six equivalent Li, two equivalent La, and six equivalent Bi atoms to form distorted LiLi6La2Bi6 cuboctahedra that share corners with two equivalent LiLi6La2Bi6 cuboctahedra, corners with twelve equivalent LaLi2Bi6 octahedra, corners with six equivalent LiLi3Bi4 tetrahedra, faces with six equivalent LiLi6La2Bi6 cuboctahedra, faces with two equivalent LaLi2Bi6 octahedra, and faces with six equivalent LiLi3Bi4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. Both Li–La bond lengths are 3.79 Å. All Li–Bi bond lengths are 3.33 Å. La is bonded to two equivalent Li and six equivalent Bi atoms to form LaLi2Bi6 octahedra that share corners with twelve equivalent LiLi6La2Bi6 cuboctahedra, corners with two equivalent LaLi2Bi6 octahedra, corners with six equivalent LiLi3Bi4 tetrahedra, edges with six equivalent LaLi2Bi6 octahedra, edges with six equivalent LiLi3Bi4 tetrahedra, faces with two equivalent LiLi6La2Bi6 cuboctahedra, and faces with six equivalent LiLi3Bi4 tetrahedra. The corner-sharing octahedral tilt angles are 0°. All La–Bi bond lengths are 3.36 Å. Bi is bonded in a 10-coordinate geometry to seven Li and three equivalent La atoms.