ThIrAl crystallizes in the hexagonal P-62m space group. Th(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 9-coordinate geometry to three equivalent Th(1) and six equivalent Al(1) atoms. In the second Ir site, Ir(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 Ir(1) and two equivalent Ir(2) atoms.
ThIrAl crystallizes in the hexagonal P-62m space group. Th(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. The Th(1)-Ir(2) bond length is 3.02 Å. All Th(1)-Ir(1) bond lengths are 2.99 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 9-coordinate geometry to three equivalent Th(1) and six equivalent Al(1) atoms. All Ir(2)-Al(1) bond lengths are 2.64 Å. In the second Ir site, Ir(1) is bonded in a 9-coordinate geometry to six equivalent Th(1) and three equivalent Al(1) atoms. All Ir(1)-Al(1) bond lengths are 2.86 Å. Al(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1) and two equivalent Ir(2) atoms.