Ce2Ni5C3 crystallizes in the tetragonal P4/mbm space group. Ce(1) is bonded in a 14-coordinate geometry to two equivalent Ni(2), eight equivalent Ni(1), and four equivalent C(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted bent 150 degrees geometry to four equivalent Ce(1), one C(1), and one C(2) atom. In the second Ni site, Ni(2) is bonded in a linear geometry to four equivalent Ce(1) and two equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Ni(2) and four equivalent Ni(1) atoms to form corner-sharing CNi6 octahedra. The corner-sharing octahedra are not tilted. In the second C site, C(2) is bonded in a 7-coordinate geometry to four equivalent Ce(1), two equivalent Ni(1), and one C(2) atom.
Ce2Ni5C3 crystallizes in the tetragonal P4/mbm space group. Ce(1) is bonded in a 14-coordinate geometry to two equivalent Ni(2), eight equivalent Ni(1), and four equivalent C(2) atoms. Both Ce(1)-Ni(2) bond lengths are 3.14 Å. There are four shorter (2.96 Å) and four longer (2.97 Å) Ce(1)-Ni(1) bond lengths. All Ce(1)-C(2) bond lengths are 2.78 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a distorted bent 150 degrees geometry to four equivalent Ce(1), one C(1), and one C(2) atom. The Ni(1)-C(1) bond length is 1.88 Å. The Ni(1)-C(2) bond length is 1.92 Å. In the second Ni site, Ni(2) is bonded in a linear geometry to four equivalent Ce(1) and two equivalent C(1) atoms. Both Ni(2)-C(1) bond lengths are 1.94 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded to two equivalent Ni(2) and four equivalent Ni(1) atoms to form corner-sharing CNi6 octahedra. The corner-sharing octahedra are not tilted. In the second C site, C(2) is bonded in a 7-coordinate geometry to four equivalent Ce(1), two equivalent Ni(1), and one C(2) atom. The C(2)-C(2) bond length is 1.37 Å.