Ce7Ni3 crystallizes in the orthorhombic Cmc2_1 space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 3-coordinate geometry to one Ni(1) and two equivalent Ni(2) atoms. In the second Ce site, Ce(2) is bonded in a 3-coordinate geometry to two equivalent Ni(1) and two equivalent Ni(2) atoms. In the third Ce site, Ce(3) is bonded in a 3-coordinate geometry to one Ni(1) and three equivalent Ni(2) atoms. In the fourth Ce site, Ce(4) is bonded in a 2-coordinate geometry to four equivalent Ni(2) atoms. In the fifth Ce site, Ce(5) is bonded in a distorted L-shaped geometry to two equivalent Ni(1) and two equivalent Ni(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Ce(1), two equivalent Ce(2), two equivalent Ce(3), and four equivalent Ce(5) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(2), two equivalent Ce(4), two equivalent Ce(5), and three equivalent Ce(3) atoms.
Ce7Ni3 crystallizes in the orthorhombic Cmc2_1 space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 3-coordinate geometry to one Ni(1) and two equivalent Ni(2) atoms. The Ce(1)-Ni(1) bond length is 2.93 Å. Both Ce(1)-Ni(2) bond lengths are 2.93 Å. In the second Ce site, Ce(2) is bonded in a 3-coordinate geometry to two equivalent Ni(1) and two equivalent Ni(2) atoms. There is one shorter (2.89 Å) and one longer (3.40 Å) Ce(2)-Ni(1) bond length. Both Ce(2)-Ni(2) bond lengths are 2.74 Å. In the third Ce site, Ce(3) is bonded in a 3-coordinate geometry to one Ni(1) and three equivalent Ni(2) atoms. The Ce(3)-Ni(1) bond length is 2.74 Å. There are a spread of Ce(3)-Ni(2) bond distances ranging from 2.74-3.40 Å. In the fourth Ce site, Ce(4) is bonded in a 2-coordinate geometry to four equivalent Ni(2) atoms. There are two shorter (2.78 Å) and two longer (3.32 Å) Ce(4)-Ni(2) bond lengths. In the fifth Ce site, Ce(5) is bonded in a distorted L-shaped geometry to two equivalent Ni(1) and two equivalent Ni(2) atoms. There is one shorter (2.77 Å) and one longer (3.32 Å) Ce(5)-Ni(1) bond length. There is one shorter (2.77 Å) and one longer (3.32 Å) Ce(5)-Ni(2) bond length. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Ce(1), two equivalent Ce(2), two equivalent Ce(3), and four equivalent Ce(5) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(2), two equivalent Ce(4), two equivalent Ce(5), and three equivalent Ce(3) atoms.