Ce(Ni2B)6 crystallizes in the monoclinic P2_1 space group. Ce(1) is bonded in a 24-coordinate geometry to one Ni(10), one Ni(11), one Ni(12), one Ni(7), one Ni(8), one Ni(9), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(6), one B(1), one B(2), one B(3), one B(4), one B(5), and one B(6) atom. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 3-coordinate geometry to two equivalent Ce(1), one B(3), one B(5), and one B(6) atom. In the second Ni site, Ni(2) is bonded in a 3-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), and one B(5) atom. In the third Ni site, Ni(3) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(3), one B(4), and one B(6) atom. In the fourth Ni site, Ni(4) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), one B(4), and one B(6) atom. In the fifth Ni site, Ni(5) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(2), one B(3), one B(5), and one B(6) atom. In the sixth Ni site, Ni(6) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), one B(3), and one B(5) atom. In the seventh Ni site, Ni(7) is bonded in a 3-coordinate geometry to one Ce(1), one B(2), one B(4), and one B(6) atom. In the eighth Ni site, Ni(8) is bonded in a 3-coordinate geometry to one Ce(1), one B(1), one B(3), and one B(4) atom. In the ninth Ni site, Ni(9) is bonded to one Ce(1), one B(1), one B(2), one B(4), and one B(5) atom to form distorted face-sharing NiCeB4 tetrahedra. In the tenth Ni site, Ni(10) is bonded to one Ce(1), one B(3), one B(4), one B(5), and one B(6) atom to form distorted face-sharing NiCeB4 tetrahedra. In the eleventh Ni site, Ni(11) is bonded in a distorted T-shaped geometry to one Ce(1), one B(1), one B(4), and one B(6) atom. In the twelfth Ni site, Ni(12) is bonded in a 3-coordinate geometry to one Ce(1), one B(2), one B(3), and one B(5) atom. There are six inequivalent B sites. In the first B site, B(1) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(11), one Ni(2), one Ni(3), one Ni(4), one Ni(6), one Ni(8), and one Ni(9) atom. In the second B site, B(2) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(12), one Ni(2), one Ni(4), one Ni(5), one Ni(6), one Ni(7), and one Ni(9) atom. In the third B site, B(3) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(12), one Ni(3), one Ni(5), one Ni(6), and one Ni(8) atom. In the fourth B site, B(4) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(10), one Ni(11), one Ni(3), one Ni(4), one Ni(7), one Ni(8), and one Ni(9) atom. In the fifth B site, B(5) is bonded in a 8-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(12), one Ni(2), one Ni(5), one Ni(6), and one Ni(9) atom. In the sixth B site, B(6) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(11), one Ni(3), one Ni(4), one Ni(5), and one Ni(7) atom.
Ce(Ni2B)6 crystallizes in the monoclinic P2_1 space group. Ce(1) is bonded in a 24-coordinate geometry to one Ni(10), one Ni(11), one Ni(12), one Ni(7), one Ni(8), one Ni(9), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), two equivalent Ni(5), two equivalent Ni(6), one B(1), one B(2), one B(3), one B(4), one B(5), and one B(6) atom. The Ce(1)-Ni(10) bond length is 3.12 Å. The Ce(1)-Ni(11) bond length is 3.07 Å. The Ce(1)-Ni(12) bond length is 3.06 Å. The Ce(1)-Ni(7) bond length is 3.02 Å. The Ce(1)-Ni(8) bond length is 3.03 Å. The Ce(1)-Ni(9) bond length is 3.12 Å. There is one shorter (3.15 Å) and one longer (3.38 Å) Ce(1)-Ni(1) bond length. There is one shorter (3.15 Å) and one longer (3.38 Å) Ce(1)-Ni(2) bond length. There is one shorter (3.18 Å) and one longer (3.34 Å) Ce(1)-Ni(3) bond length. There is one shorter (3.19 Å) and one longer (3.33 Å) Ce(1)-Ni(4) bond length. There is one shorter (3.20 Å) and one longer (3.27 Å) Ce(1)-Ni(5) bond length. There is one shorter (3.21 Å) and one longer (3.27 Å) Ce(1)-Ni(6) bond length. The Ce(1)-B(1) bond length is 3.28 Å. The Ce(1)-B(2) bond length is 3.14 Å. The Ce(1)-B(3) bond length is 3.13 Å. The Ce(1)-B(4) bond length is 3.09 Å. The Ce(1)-B(5) bond length is 3.03 Å. The Ce(1)-B(6) bond length is 3.27 Å. There are twelve inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 3-coordinate geometry to two equivalent Ce(1), one B(3), one B(5), and one B(6) atom. The Ni(1)-B(3) bond length is 2.04 Å. The Ni(1)-B(5) bond length is 2.00 Å. The Ni(1)-B(6) bond length is 2.08 Å. In the second Ni site, Ni(2) is bonded in a 3-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), and one B(5) atom. The Ni(2)-B(1) bond length is 2.08 Å. The Ni(2)-B(2) bond length is 2.04 Å. The Ni(2)-B(5) bond length is 2.00 Å. In the third Ni site, Ni(3) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(3), one B(4), and one B(6) atom. The Ni(3)-B(1) bond length is 2.02 Å. The Ni(3)-B(3) bond length is 2.00 Å. The Ni(3)-B(4) bond length is 2.09 Å. The Ni(3)-B(6) bond length is 2.09 Å. In the fourth Ni site, Ni(4) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), one B(4), and one B(6) atom. The Ni(4)-B(1) bond length is 2.10 Å. The Ni(4)-B(2) bond length is 2.00 Å. The Ni(4)-B(4) bond length is 2.09 Å. The Ni(4)-B(6) bond length is 2.02 Å. In the fifth Ni site, Ni(5) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(2), one B(3), one B(5), and one B(6) atom. The Ni(5)-B(2) bond length is 2.01 Å. The Ni(5)-B(3) bond length is 2.11 Å. The Ni(5)-B(5) bond length is 2.08 Å. The Ni(5)-B(6) bond length is 2.04 Å. In the sixth Ni site, Ni(6) is bonded in a 4-coordinate geometry to two equivalent Ce(1), one B(1), one B(2), one B(3), and one B(5) atom. The Ni(6)-B(1) bond length is 2.04 Å. The Ni(6)-B(2) bond length is 2.11 Å. The Ni(6)-B(3) bond length is 2.01 Å. The Ni(6)-B(5) bond length is 2.08 Å. In the seventh Ni site, Ni(7) is bonded in a 3-coordinate geometry to one Ce(1), one B(2), one B(4), and one B(6) atom. The Ni(7)-B(2) bond length is 2.03 Å. The Ni(7)-B(4) bond length is 2.08 Å. The Ni(7)-B(6) bond length is 2.13 Å. In the eighth Ni site, Ni(8) is bonded in a 3-coordinate geometry to one Ce(1), one B(1), one B(3), and one B(4) atom. The Ni(8)-B(1) bond length is 2.13 Å. The Ni(8)-B(3) bond length is 2.03 Å. The Ni(8)-B(4) bond length is 2.08 Å. In the ninth Ni site, Ni(9) is bonded to one Ce(1), one B(1), one B(2), one B(4), and one B(5) atom to form distorted face-sharing NiCeB4 tetrahedra. The Ni(9)-B(1) bond length is 1.98 Å. The Ni(9)-B(2) bond length is 2.08 Å. The Ni(9)-B(4) bond length is 2.03 Å. The Ni(9)-B(5) bond length is 2.05 Å. In the tenth Ni site, Ni(10) is bonded to one Ce(1), one B(3), one B(4), one B(5), and one B(6) atom to form distorted face-sharing NiCeB4 tetrahedra. The Ni(10)-B(3) bond length is 2.08 Å. The Ni(10)-B(4) bond length is 2.03 Å. The Ni(10)-B(5) bond length is 2.05 Å. The Ni(10)-B(6) bond length is 1.98 Å. In the eleventh Ni site, Ni(11) is bonded in a distorted T-shaped geometry to one Ce(1), one B(1), one B(4), and one B(6) atom. The Ni(11)-B(1) bond length is 1.99 Å. The Ni(11)-B(4) bond length is 2.05 Å. The Ni(11)-B(6) bond length is 1.99 Å. In the twelfth Ni site, Ni(12) is bonded in a 3-coordinate geometry to one Ce(1), one B(2), one B(3), and one B(5) atom. The Ni(12)-B(2) bond length is 2.08 Å. The Ni(12)-B(3) bond length is 2.07 Å. The Ni(12)-B(5) bond length is 2.17 Å. There are six inequivalent B sites. In the first B site, B(1) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(11), one Ni(2), one Ni(3), one Ni(4), one Ni(6), one Ni(8), and one Ni(9) atom. In the second B site, B(2) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(12), one Ni(2), one Ni(4), one Ni(5), one Ni(6), one Ni(7), and one Ni(9) atom. In the third B site, B(3) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(12), one Ni(3), one Ni(5), one Ni(6), and one Ni(8) atom. In the fourth B site, B(4) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(10), one Ni(11), one Ni(3), one Ni(4), one Ni(7), one Ni(8), and one Ni(9) atom. In the fifth B site, B(5) is bonded in a 8-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(12), one Ni(2), one Ni(5), one Ni(6), and one Ni(9) atom. In the sixth B site, B(6) is bonded in a 7-coordinate geometry to one Ce(1), one Ni(1), one Ni(10), one Ni(11), one Ni(3), one Ni(4), one Ni(5), and one Ni(7) atom.