Al8Co2Ce crystallizes in the orthorhombic Pbam space group. Ce(1) is bonded in a 13-coordinate geometry to one Al(2), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(9) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Al(2), one Al(8), one Al(9), two equivalent Al(5), two equivalent Al(6), and two equivalent Al(7) atoms. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to one Al(9), two equivalent Al(1), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(8) atoms. There are nine inequivalent Al sites. In the first Al site, Al(9) is bonded in a distorted linear geometry to two equivalent Ce(1), one Co(1), one Co(2), two equivalent Al(3), and two equivalent Al(7) atoms. In the second Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Co(2) and two equivalent Al(3) atoms. In the third Al site, Al(2) is bonded in a distorted linear geometry to two equivalent Ce(1), two equivalent Co(1), and four equivalent Al(7) atoms. In the fourth Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Co(2), one Al(1), one Al(4), one Al(5), one Al(6), two equivalent Al(8), and two equivalent Al(9) atoms. In the fifth Al site, Al(4) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(2), one Al(3), and one Al(7) atom. In the sixth Al site, Al(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(3), and one Al(7) atom. In the seventh Al site, Al(6) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(3), and two equivalent Al(7) atoms. In the eighth Al site, Al(7) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(4), one Al(5), two equivalent Al(2), two equivalent Al(6), and two equivalent Al(9) atoms. In the ninth Al site, Al(8) is bonded in a 3-coordinate geometry to one Co(1), two equivalent Co(2), and two equivalent Al(3) atoms.
Al8Co2Ce crystallizes in the orthorhombic Pbam space group. Ce(1) is bonded in a 13-coordinate geometry to one Al(2), two equivalent Al(3), two equivalent Al(4), two equivalent Al(5), two equivalent Al(6), two equivalent Al(7), and two equivalent Al(9) atoms. The Ce(1)-Al(2) bond length is 3.25 Å. Both Ce(1)-Al(3) bond lengths are 3.13 Å. Both Ce(1)-Al(4) bond lengths are 3.14 Å. Both Ce(1)-Al(5) bond lengths are 3.16 Å. Both Ce(1)-Al(6) bond lengths are 3.18 Å. Both Ce(1)-Al(7) bond lengths are 3.11 Å. There is one shorter (3.18 Å) and one longer (3.29 Å) Ce(1)-Al(9) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 9-coordinate geometry to one Al(2), one Al(8), one Al(9), two equivalent Al(5), two equivalent Al(6), and two equivalent Al(7) atoms. The Co(1)-Al(2) bond length is 2.32 Å. The Co(1)-Al(8) bond length is 2.45 Å. The Co(1)-Al(9) bond length is 2.33 Å. Both Co(1)-Al(5) bond lengths are 2.49 Å. Both Co(1)-Al(6) bond lengths are 2.50 Å. Both Co(1)-Al(7) bond lengths are 2.57 Å. In the second Co site, Co(2) is bonded in a 9-coordinate geometry to one Al(9), two equivalent Al(1), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(8) atoms. The Co(2)-Al(9) bond length is 2.30 Å. Both Co(2)-Al(1) bond lengths are 2.45 Å. Both Co(2)-Al(3) bond lengths are 2.54 Å. Both Co(2)-Al(4) bond lengths are 2.53 Å. There is one shorter (2.50 Å) and one longer (2.51 Å) Co(2)-Al(8) bond length. There are nine inequivalent Al sites. In the first Al site, Al(9) is bonded in a distorted linear geometry to two equivalent Ce(1), one Co(1), one Co(2), two equivalent Al(3), and two equivalent Al(7) atoms. Both Al(9)-Al(3) bond lengths are 2.80 Å. Both Al(9)-Al(7) bond lengths are 2.77 Å. In the second Al site, Al(1) is bonded in a 4-coordinate geometry to four equivalent Co(2) and two equivalent Al(3) atoms. Both Al(1)-Al(3) bond lengths are 2.61 Å. In the third Al site, Al(2) is bonded in a distorted linear geometry to two equivalent Ce(1), two equivalent Co(1), and four equivalent Al(7) atoms. All Al(2)-Al(7) bond lengths are 2.75 Å. In the fourth Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Co(2), one Al(1), one Al(4), one Al(5), one Al(6), two equivalent Al(8), and two equivalent Al(9) atoms. The Al(3)-Al(4) bond length is 2.67 Å. The Al(3)-Al(5) bond length is 3.10 Å. The Al(3)-Al(6) bond length is 2.67 Å. Both Al(3)-Al(8) bond lengths are 3.08 Å. In the fifth Al site, Al(4) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(2), one Al(3), and one Al(7) atom. The Al(4)-Al(7) bond length is 2.85 Å. In the sixth Al site, Al(5) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(3), and one Al(7) atom. The Al(5)-Al(7) bond length is 2.65 Å. In the seventh Al site, Al(6) is bonded in a 2-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(3), and two equivalent Al(7) atoms. There is one shorter (2.65 Å) and one longer (2.97 Å) Al(6)-Al(7) bond length. In the eighth Al site, Al(7) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Co(1), one Al(4), one Al(5), two equivalent Al(2), two equivalent Al(6), and two equivalent Al(9) atoms. In the ninth Al site, Al(8) is bonded in a 3-coordinate geometry to one Co(1), two equivalent Co(2), and two equivalent Al(3) atoms.