ThRhAl crystallizes in the hexagonal P-62m space group. Th(1) is bonded in a 5-coordinate geometry to one Rh(2) and four equivalent Rh(1) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 9-coordinate geometry to three equivalent Th(1) and six equivalent Al(1) atoms. In the second Rh site, Rh(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Al(1) atoms. Al(1) is bonded in a 4-coordinate geometry to two equivalent Rh(1) and two equivalent Rh(2) atoms.
ThRhAl crystallizes in the hexagonal P-62m space group. Th(1) is bonded in a 5-coordinate geometry to one Rh(2) and four equivalent Rh(1) atoms. The Th(1)-Rh(2) bond length is 3.01 Å. All Th(1)-Rh(1) bond lengths are 2.99 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a 9-coordinate geometry to three equivalent Th(1) and six equivalent Al(1) atoms. All Rh(2)-Al(1) bond lengths are 2.64 Å. In the second Rh site, Rh(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Al(1) atoms. All Rh(1)-Al(1) bond lengths are 2.85 Å. Al(1) is bonded in a 4-coordinate geometry to two equivalent Rh(1) and two equivalent Rh(2) atoms.