Ce2Co5B2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 20-coordinate geometry to one Ce(1), one Ce(2), six equivalent Co(1), six equivalent Co(2), three equivalent B(1), and three equivalent B(2) atoms. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to one Ce(1), three equivalent Ce(2), three equivalent Co(3), and nine equivalent Co(1) atoms. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Ce(1), three equivalent Ce(2), one Co(3), one B(1), and one B(2) atom. In the second Co site, Co(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Ce(1), two equivalent B(1), and two equivalent B(2) atoms. In the third Co site, Co(3) is bonded to six equivalent Ce(2) and six equivalent Co(1) atoms to form edge-sharing CoCe6Co6 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(1), three equivalent Co(1), and three equivalent Co(2) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Ce(1), three equivalent Co(1), and three equivalent Co(2) atoms.
Ce2Co5B2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 20-coordinate geometry to one Ce(1), one Ce(2), six equivalent Co(1), six equivalent Co(2), three equivalent B(1), and three equivalent B(2) atoms. The Ce(1)-Ce(1) bond length is 3.10 Å. The Ce(1)-Ce(2) bond length is 3.03 Å. All Ce(1)-Co(1) bond lengths are 2.87 Å. All Ce(1)-Co(2) bond lengths are 2.98 Å. All Ce(1)-B(1) bond lengths are 2.94 Å. All Ce(1)-B(2) bond lengths are 2.94 Å. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to one Ce(1), three equivalent Ce(2), three equivalent Co(3), and nine equivalent Co(1) atoms. All Ce(2)-Ce(2) bond lengths are 3.04 Å. All Ce(2)-Co(3) bond lengths are 2.96 Å. There are three shorter (2.90 Å) and six longer (3.07 Å) Ce(2)-Co(1) bond lengths. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted L-shaped geometry to two equivalent Ce(1), three equivalent Ce(2), one Co(3), one B(1), and one B(2) atom. The Co(1)-Co(3) bond length is 2.54 Å. The Co(1)-B(1) bond length is 2.04 Å. The Co(1)-B(2) bond length is 2.02 Å. In the second Co site, Co(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Ce(1), two equivalent B(1), and two equivalent B(2) atoms. Both Co(2)-B(1) bond lengths are 2.09 Å. Both Co(2)-B(2) bond lengths are 2.07 Å. In the third Co site, Co(3) is bonded to six equivalent Ce(2) and six equivalent Co(1) atoms to form edge-sharing CoCe6Co6 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(1), three equivalent Co(1), and three equivalent Co(2) atoms. In the second B site, B(2) is bonded in a 6-coordinate geometry to three equivalent Ce(1), three equivalent Co(1), and three equivalent Co(2) atoms.