CeIr5 crystallizes in the hexagonal P6/mmm space group. Ce(1) is bonded in a distorted hexagonal planar geometry to six equivalent Ir(1) and twelve equivalent Ir(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 12-coordinate geometry to three equivalent Ce(1), three equivalent Ir(1), and six equivalent Ir(2) atoms. In the second Ir site, Ir(2) is bonded to four equivalent Ce(1), four equivalent Ir(1), and four equivalent Ir(2) atoms to form a mixture of corner, face, and edge-sharing IrCe4Ir8 cuboctahedra.
CeIr5 crystallizes in the hexagonal P6/mmm space group. Ce(1) is bonded in a distorted hexagonal planar geometry to six equivalent Ir(1) and twelve equivalent Ir(2) atoms. All Ce(1)-Ir(1) bond lengths are 3.05 Å. All Ce(1)-Ir(2) bond lengths are 3.42 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 12-coordinate geometry to three equivalent Ce(1), three equivalent Ir(1), and six equivalent Ir(2) atoms. All Ir(1)-Ir(1) bond lengths are 3.05 Å. All Ir(1)-Ir(2) bond lengths are 2.65 Å. In the second Ir site, Ir(2) is bonded to four equivalent Ce(1), four equivalent Ir(1), and four equivalent Ir(2) atoms to form a mixture of corner, face, and edge-sharing IrCe4Ir8 cuboctahedra. All Ir(2)-Ir(2) bond lengths are 2.64 Å.