CeNi4Al crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a 6-coordinate geometry to six equivalent Ni(1) and eight equivalent Ni(2) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to three equivalent Ce(1), three equivalent Ni(1), four equivalent Ni(2), and two equivalent Al(1) atoms. In the second Ni site, Ni(2) is bonded to four equivalent Ce(1), two equivalent Ni(2), four equivalent Ni(1), and two equivalent Al(1) atoms to form a mixture of distorted face, corner, and edge-sharing NiCe4Al2Ni6 cuboctahedra. Al(1) is bonded in a 8-coordinate geometry to four equivalent Ni(1) and four equivalent Ni(2) atoms.
CeNi4Al crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a 6-coordinate geometry to six equivalent Ni(1) and eight equivalent Ni(2) atoms. There are two shorter (2.72 Å) and four longer (2.88 Å) Ce(1)-Ni(1) bond lengths. All Ce(1)-Ni(2) bond lengths are 3.15 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to three equivalent Ce(1), three equivalent Ni(1), four equivalent Ni(2), and two equivalent Al(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.83 Å. All Ni(1)-Ni(2) bond lengths are 2.47 Å. Both Ni(1)-Al(1) bond lengths are 2.47 Å. In the second Ni site, Ni(2) is bonded to four equivalent Ce(1), two equivalent Ni(2), four equivalent Ni(1), and two equivalent Al(1) atoms to form a mixture of distorted face, corner, and edge-sharing NiCe4Al2Ni6 cuboctahedra. Both Ni(2)-Ni(2) bond lengths are 2.51 Å. Both Ni(2)-Al(1) bond lengths are 2.42 Å. Al(1) is bonded in a 8-coordinate geometry to four equivalent Ni(1) and four equivalent Ni(2) atoms.