CeRhAl crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to two equivalent Rh(2), three equivalent Rh(1), three equivalent Al(1), and three equivalent Al(2) atoms. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to one Rh(1) and four equivalent Rh(2) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to one Ce(2), three equivalent Ce(1), two equivalent Al(1), and three equivalent Al(2) atoms. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), one Al(2), and two equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to three equivalent Ce(1), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second Al site, Al(2) is bonded to three equivalent Ce(1), one Rh(2), and three equivalent Rh(1) atoms to form a mixture of distorted face and edge-sharing AlCe3Rh4 tetrahedra.
CeRhAl crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to two equivalent Rh(2), three equivalent Rh(1), three equivalent Al(1), and three equivalent Al(2) atoms. Both Ce(1)-Rh(2) bond lengths are 2.93 Å. There are two shorter (3.15 Å) and one longer (3.16 Å) Ce(1)-Rh(1) bond length. There is one shorter (3.31 Å) and two longer (3.33 Å) Ce(1)-Al(1) bond lengths. There is one shorter (3.14 Å) and two longer (3.21 Å) Ce(1)-Al(2) bond lengths. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to one Rh(1) and four equivalent Rh(2) atoms. The Ce(2)-Rh(1) bond length is 2.63 Å. There are two shorter (3.00 Å) and two longer (3.03 Å) Ce(2)-Rh(2) bond lengths. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to one Ce(2), three equivalent Ce(1), two equivalent Al(1), and three equivalent Al(2) atoms. Both Rh(1)-Al(1) bond lengths are 2.61 Å. There is one shorter (2.62 Å) and two longer (2.64 Å) Rh(1)-Al(2) bond lengths. In the second Rh site, Rh(2) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), one Al(2), and two equivalent Al(1) atoms. The Rh(2)-Al(2) bond length is 2.67 Å. Both Rh(2)-Al(1) bond lengths are 2.77 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to three equivalent Ce(1), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second Al site, Al(2) is bonded to three equivalent Ce(1), one Rh(2), and three equivalent Rh(1) atoms to form a mixture of distorted face and edge-sharing AlCe3Rh4 tetrahedra.