UIrAl crystallizes in the hexagonal P-62m space group. U(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 U(1) and six equivalent Al(1) atoms. In the second Ir site, Ir(1) is bonded in a 9-coordinate geometry to six equivalent U(1) and three equivalent Al(1) atoms. Al(1) is bonded to two equivalent Ir(1) and two equivalent Ir(2) atoms to form a mixture of distorted corner and edge-sharing AlIr4 tetrahedra.
UIrAl crystallizes in the hexagonal P-62m space group. U(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. The U(1)-Ir(2) bond length is 2.91 Å. All U(1)-Ir(1) bond lengths are 2.92 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(2) is bonded in a 9-coordinate geometry to three equivalent U(1) and six equivalent Al(1) atoms. All Ir(2)-Al(1) bond lengths are 2.63 Å. In the second Ir site, Ir(1) is bonded in a 9-coordinate geometry to six equivalent U(1) and three equivalent Al(1) atoms. All Ir(1)-Al(1) bond lengths are 2.70 Å. Al(1) is bonded to two equivalent Ir(1) and two equivalent Ir(2) atoms to form a mixture of distorted corner and edge-sharing AlIr4 tetrahedra.