Materials Data on K2LiAlP2 by Materials Project
K2LiAlP2 is Matlockite-derived structured and crystallizes in the orthorhombic Ibam space group. The structure is three-dimensional. K1+ is bonded to five equivalent P3- atoms to form distorted KP5 trigonal bipyramids that share corners with six equivalent LiP4 tetrahedra, corners with six equivalent AlP4 tetrahedra, corners with four equivalent KP5 trigonal bipyramids, edges with two equivalent LiP4 tetrahedra, edges with two equivalent AlP4 tetrahedra, and edges with eight equivalent KP5 trigonal bipyramids. There are a spread of K–P bond distances ranging from 3.29–3.56 Å. Li1+ is bonded to four equivalent P3- atoms to form LiP4 tetrahedra that share corners with four equivalent AlP4 tetrahedra, corners with twelve equivalent KP5 trigonal bipyramids, edges with two equivalent LiP4 tetrahedra, edges with two equivalent AlP4 tetrahedra, and edges with four equivalent KP5 trigonal bipyramids. All Li–P bond lengths are 2.65 Å. Al3+ is bonded to four equivalent P3- atoms to form AlP4 tetrahedra that share corners with four equivalent LiP4 tetrahedra, corners with twelve equivalent KP5 trigonal bipyramids, edges with two equivalent LiP4 tetrahedra, edges with two equivalent AlP4 tetrahedra, and edges with four equivalent KP5 trigonal bipyramids. All Al–P bond lengths are 2.44 Å. P3- is bonded in a 9-coordinate geometry to five equivalent K1+, two equivalent Li1+, and two equivalent Al3+ atoms.