Ce4Cu5Sb8 crystallizes in the tetragonal P4mm space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to four equivalent Cu(1), four equivalent Sb(2), and four equivalent Sb(5) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. In the second Ce site, Ce(2) is bonded to four equivalent Cu(2), four equivalent Sb(1), and four equivalent Sb(6) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. In the third Ce site, Ce(3) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(3), four equivalent Sb(1), and four equivalent Sb(3) atoms. In the fourth Ce site, Ce(4) is bonded to four equivalent Cu(2), four equivalent Sb(2), and four equivalent Sb(4) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Sb(3), and two equivalent Sb(5) atoms. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to two equivalent Ce(2), two equivalent Ce(4), two equivalent Sb(4), and two equivalent Sb(6) atoms. In the third Cu site, Cu(3) is bonded in a 9-coordinate geometry to four equivalent Ce(3), one Sb(3), and four equivalent Sb(1) atoms. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 10-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Cu(3), and four equivalent Sb(1) atoms. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), and four equivalent Sb(2) atoms. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to four equivalent Ce(3), one Cu(3), and four equivalent Cu(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to four equivalent Ce(4) and four equivalent Cu(2) atoms. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to four equivalent Ce(1) and four equivalent Cu(1) atoms. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to four equivalent Ce(2) and four equivalent Cu(2) atoms.
Ce4Cu5Sb8 crystallizes in the tetragonal P4mm space group. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to four equivalent Cu(1), four equivalent Sb(2), and four equivalent Sb(5) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. All Ce(1)-Cu(1) bond lengths are 3.33 Å. All Ce(1)-Sb(2) bond lengths are 3.35 Å. All Ce(1)-Sb(5) bond lengths are 3.33 Å. In the second Ce site, Ce(2) is bonded to four equivalent Cu(2), four equivalent Sb(1), and four equivalent Sb(6) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. All Ce(2)-Cu(2) bond lengths are 3.25 Å. All Ce(2)-Sb(1) bond lengths are 3.37 Å. All Ce(2)-Sb(6) bond lengths are 3.30 Å. In the third Ce site, Ce(3) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(3), four equivalent Sb(1), and four equivalent Sb(3) atoms. All Ce(3)-Cu(1) bond lengths are 3.42 Å. All Ce(3)-Cu(3) bond lengths are 3.44 Å. All Ce(3)-Sb(1) bond lengths are 3.49 Å. All Ce(3)-Sb(3) bond lengths are 3.42 Å. In the fourth Ce site, Ce(4) is bonded to four equivalent Cu(2), four equivalent Sb(2), and four equivalent Sb(4) atoms to form a mixture of face, corner, and edge-sharing CeCu4Sb8 cuboctahedra. All Ce(4)-Cu(2) bond lengths are 3.34 Å. All Ce(4)-Sb(2) bond lengths are 3.37 Å. All Ce(4)-Sb(4) bond lengths are 3.33 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Sb(3), and two equivalent Sb(5) atoms. Both Cu(1)-Sb(3) bond lengths are 2.64 Å. Both Cu(1)-Sb(5) bond lengths are 2.74 Å. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to two equivalent Ce(2), two equivalent Ce(4), two equivalent Sb(4), and two equivalent Sb(6) atoms. Both Cu(2)-Sb(4) bond lengths are 2.73 Å. Both Cu(2)-Sb(6) bond lengths are 2.73 Å. In the third Cu site, Cu(3) is bonded in a 9-coordinate geometry to four equivalent Ce(3), one Sb(3), and four equivalent Sb(1) atoms. The Cu(3)-Sb(3) bond length is 2.48 Å. All Cu(3)-Sb(1) bond lengths are 2.65 Å. There are six inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 10-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Cu(3), and four equivalent Sb(1) atoms. All Sb(1)-Sb(1) bond lengths are 3.20 Å. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), and four equivalent Sb(2) atoms. All Sb(2)-Sb(2) bond lengths are 3.20 Å. In the third Sb site, Sb(3) is bonded in a 9-coordinate geometry to four equivalent Ce(3), one Cu(3), and four equivalent Cu(1) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to four equivalent Ce(4) and four equivalent Cu(2) atoms. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to four equivalent Ce(1) and four equivalent Cu(1) atoms. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to four equivalent Ce(2) and four equivalent Cu(2) atoms.