Al5Rh2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to three equivalent Al(2) and six equivalent Al(3) atoms. In the second Rh site, Rh(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Al(2), and six equivalent Al(3) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent Rh(2) atoms to form distorted face-sharing AlRh6 cuboctahedra. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to one Rh(1) and two equivalent Rh(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to one Rh(1) and three equivalent Rh(2) atoms.
Al5Rh2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 9-coordinate geometry to three equivalent Al(2) and six equivalent Al(3) atoms. All Rh(1)-Al(2) bond lengths are 2.67 Å. All Rh(1)-Al(3) bond lengths are 2.44 Å. In the second Rh site, Rh(2) is bonded in a 10-coordinate geometry to two equivalent Al(1), two equivalent Al(2), and six equivalent Al(3) atoms. Both Rh(2)-Al(1) bond lengths are 2.64 Å. Both Rh(2)-Al(2) bond lengths are 2.46 Å. There are two shorter (2.57 Å) and four longer (2.76 Å) Rh(2)-Al(3) bond lengths. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent Rh(2) atoms to form distorted face-sharing AlRh6 cuboctahedra. In the second Al site, Al(2) is bonded in a 3-coordinate geometry to one Rh(1) and two equivalent Rh(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to one Rh(1) and three equivalent Rh(2) atoms.