Ce5CuBi3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to six equivalent Bi(1) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Cu(1) and five equivalent Bi(1) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Bi5 pentagonal bipyramids. Cu(1) is bonded to six equivalent Ce(2) atoms to form face-sharing CuCe6 octahedra. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1) and five equivalent Ce(2) atoms.
Ce5CuBi3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to six equivalent Bi(1) atoms. All Ce(1)-Bi(1) bond lengths are 3.40 Å. In the second Ce site, Ce(2) is bonded to two equivalent Cu(1) and five equivalent Bi(1) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Bi5 pentagonal bipyramids. Both Ce(2)-Cu(1) bond lengths are 2.96 Å. There are a spread of Ce(2)-Bi(1) bond distances ranging from 3.26-3.47 Å. Cu(1) is bonded to six equivalent Ce(2) atoms to form face-sharing CuCe6 octahedra. Bi(1) is bonded in a 9-coordinate geometry to four equivalent Ce(1) and five equivalent Ce(2) atoms.