Ce5CuPb3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Cu(1), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Pb5 pentagonal bipyramids. In the second Ce site, Ce(2) is bonded to two equivalent Cu(1), one Pb(1), and four equivalent Pb(2) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Pb5 pentagonal bipyramids. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to two equivalent Pb(1) and four equivalent Pb(2) atoms. Cu(1) is bonded to two equivalent Ce(1) and four equivalent Ce(2) atoms to form face-sharing CuCe6 octahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), three equivalent Ce(1), and four equivalent Ce(3) atoms. In the second Pb site, Pb(2) is bonded in a 9-coordinate geometry to one Ce(1), four equivalent Ce(2), and four equivalent Ce(3) atoms.
Ce5CuPb3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Cu(1), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Pb5 pentagonal bipyramids. Both Ce(1)-Cu(1) bond lengths are 3.02 Å. Both Ce(1)-Pb(2) bond lengths are 3.25 Å. There is one shorter (3.43 Å) and two longer (3.48 Å) Ce(1)-Pb(1) bond lengths. In the second Ce site, Ce(2) is bonded to two equivalent Cu(1), one Pb(1), and four equivalent Pb(2) atoms to form a mixture of distorted edge, face, and corner-sharing CeCu2Pb5 pentagonal bipyramids. Both Ce(2)-Cu(1) bond lengths are 3.02 Å. The Ce(2)-Pb(1) bond length is 3.25 Å. There are a spread of Ce(2)-Pb(2) bond distances ranging from 3.25-3.48 Å. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to two equivalent Pb(1) and four equivalent Pb(2) atoms. Both Ce(3)-Pb(1) bond lengths are 3.42 Å. All Ce(3)-Pb(2) bond lengths are 3.43 Å. Cu(1) is bonded to two equivalent Ce(1) and four equivalent Ce(2) atoms to form face-sharing CuCe6 octahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), three equivalent Ce(1), and four equivalent Ce(3) atoms. In the second Pb site, Pb(2) is bonded in a 9-coordinate geometry to one Ce(1), four equivalent Ce(2), and four equivalent Ce(3) atoms.