Ce2Ir5B2 crystallizes in the trigonal R-3m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 12-coordinate geometry to one Ce(2), three equivalent Ir(3), and nine equivalent Ir(1) atoms. In the second Ce site, Ce(2) is bonded in a 20-coordinate geometry to one Ce(1), one Ce(2), six equivalent Ir(1), six equivalent Ir(2), three equivalent B(1), and three equivalent B(2) atoms. There are three inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 2-coordinate geometry to two equivalent Ce(2), three equivalent Ce(1), one Ir(3), one B(1), and one B(2) atom. In the second Ir site, Ir(2) is bonded in a distorted square co-planar geometry to four equivalent Ce(2), two equivalent B(1), and two equivalent B(2) atoms. In the third Ir site, Ir(3) is bonded to six equivalent Ce(1) and six equivalent Ir(1) atoms to form edge-sharing IrCe6Ir6 cuboctahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent Ce(2), three equivalent Ir(1), and three equivalent Ir(2) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Ce(2), three equivalent Ir(1), and three equivalent Ir(2) atoms.
Ce2Ir5B2 crystallizes in the trigonal R-3m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 12-coordinate geometry to one Ce(2), three equivalent Ir(3), and nine equivalent Ir(1) atoms. The Ce(1)-Ce(2) bond length is 3.20 Å. All Ce(1)-Ir(3) bond lengths are 3.21 Å. There are three shorter (3.15 Å) and six longer (3.28 Å) Ce(1)-Ir(1) bond lengths. In the second Ce site, Ce(2) is bonded in a 20-coordinate geometry to one Ce(1), one Ce(2), six equivalent Ir(1), six equivalent Ir(2), three equivalent B(1), and three equivalent B(2) atoms. The Ce(2)-Ce(2) bond length is 3.26 Å. All Ce(2)-Ir(1) bond lengths are 3.10 Å. All Ce(2)-Ir(2) bond lengths are 3.20 Å. All Ce(2)-B(1) bond lengths are 3.18 Å. All Ce(2)-B(2) bond lengths are 3.18 Å. There are three inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 2-coordinate geometry to two equivalent Ce(2), three equivalent Ce(1), one Ir(3), one B(1), and one B(2) atom. The Ir(1)-Ir(3) bond length is 2.74 Å. The Ir(1)-B(1) bond length is 2.16 Å. The Ir(1)-B(2) bond length is 2.18 Å. In the second Ir site, Ir(2) is bonded in a distorted square co-planar geometry to four equivalent Ce(2), two equivalent B(1), and two equivalent B(2) atoms. Both Ir(2)-B(1) bond lengths are 2.23 Å. Both Ir(2)-B(2) bond lengths are 2.25 Å. In the third Ir site, Ir(3) is bonded to six equivalent Ce(1) and six equivalent Ir(1) atoms to form edge-sharing IrCe6Ir6 cuboctahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 6-coordinate geometry to three equivalent Ce(2), three equivalent Ir(1), and three equivalent Ir(2) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Ce(2), three equivalent Ir(1), and three equivalent Ir(2) atoms.