Al2CuIr crystallizes in the orthorhombic Cmme space group. Ir(1) is bonded in a 8-coordinate geometry to four equivalent Cu(1), four equivalent Al(1), and four equivalent Al(2) atoms. Cu(1) is bonded to four equivalent Ir(1), two equivalent Cu(1), two equivalent Al(1), and four equivalent Al(2) atoms to form a mixture of distorted face, corner, and edge-sharing CuAl6Cu2Ir4 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 6-coordinate geometry to four equivalent Ir(1) and two equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Cu(1) atoms.
Al2CuIr crystallizes in the orthorhombic Cmme space group. Ir(1) is bonded in a 8-coordinate geometry to four equivalent Cu(1), four equivalent Al(1), and four equivalent Al(2) atoms. All Ir(1)-Cu(1) bond lengths are 2.90 Å. All Ir(1)-Al(1) bond lengths are 2.56 Å. There is one shorter (2.56 Å) and three longer (2.65 Å) Ir(1)-Al(2) bond lengths. Cu(1) is bonded to four equivalent Ir(1), two equivalent Cu(1), two equivalent Al(1), and four equivalent Al(2) atoms to form a mixture of distorted face, corner, and edge-sharing CuAl6Cu2Ir4 cuboctahedra. Both Cu(1)-Cu(1) bond lengths are 2.53 Å. Both Cu(1)-Al(1) bond lengths are 2.60 Å. All Cu(1)-Al(2) bond lengths are 2.54 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 6-coordinate geometry to four equivalent Ir(1) and two equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to four equivalent Ir(1) and four equivalent Cu(1) atoms.