Ce4(CoB2)3 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 16-coordinate geometry to four equivalent Ce(2), three equivalent Co(1), three equivalent Co(2), and six equivalent B(1) atoms. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to four equivalent Ce(1), three equivalent Co(1), three equivalent Co(2), and six equivalent B(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to six equivalent Ce(1), six equivalent Ce(2), and two equivalent Co(2) atoms. In the second Co site, Co(2) is bonded in a 13-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), one Co(1), and six equivalent B(1) atoms. B(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Co(2), and three equivalent B(1) atoms.
Ce4(CoB2)3 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 16-coordinate geometry to four equivalent Ce(2), three equivalent Co(1), three equivalent Co(2), and six equivalent B(1) atoms. There are three shorter (3.01 Å) and one longer (3.05 Å) Ce(1)-Ce(2) bond length. All Ce(1)-Co(1) bond lengths are 3.38 Å. All Ce(1)-Co(2) bond lengths are 3.16 Å. All Ce(1)-B(1) bond lengths are 2.74 Å. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to four equivalent Ce(1), three equivalent Co(1), three equivalent Co(2), and six equivalent B(1) atoms. All Ce(2)-Co(1) bond lengths are 3.37 Å. All Ce(2)-Co(2) bond lengths are 3.16 Å. All Ce(2)-B(1) bond lengths are 2.74 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 14-coordinate geometry to six equivalent Ce(1), six equivalent Ce(2), and two equivalent Co(2) atoms. Both Co(1)-Co(2) bond lengths are 2.48 Å. In the second Co site, Co(2) is bonded in a 13-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), one Co(1), and six equivalent B(1) atoms. All Co(2)-B(1) bond lengths are 2.10 Å. B(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Co(2), and three equivalent B(1) atoms. There are two shorter (1.73 Å) and one longer (1.76 Å) B(1)-B(1) bond length.