AlCuY crystallizes in the hexagonal P-62m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to six equivalent Cu(1) and three equivalent Al(1) atoms. In the second Y site, Y(2) is bonded in a distorted q6 geometry to three equivalent Cu(1) and six equivalent Al(1) atoms. Cu(1) is bonded in a 7-coordinate geometry to one Y(2), four equivalent Y(1), and two equivalent Al(1) atoms. Al(1) is bonded in a 8-coordinate geometry to two equivalent Y(1), two equivalent Y(2), two equivalent Cu(1), and two equivalent Al(1) atoms.
AlCuY crystallizes in the hexagonal P-62m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to six equivalent Cu(1) and three equivalent Al(1) atoms. All Y(1)-Cu(1) bond lengths are 3.17 Å. All Y(1)-Al(1) bond lengths are 2.84 Å. In the second Y site, Y(2) is bonded in a distorted q6 geometry to three equivalent Cu(1) and six equivalent Al(1) atoms. All Y(2)-Cu(1) bond lengths are 2.87 Å. All Y(2)-Al(1) bond lengths are 2.82 Å. Cu(1) is bonded in a 7-coordinate geometry to one Y(2), four equivalent Y(1), and two equivalent Al(1) atoms. Both Cu(1)-Al(1) bond lengths are 2.61 Å. Al(1) is bonded in a 8-coordinate geometry to two equivalent Y(1), two equivalent Y(2), two equivalent Cu(1), and two equivalent Al(1) atoms. Both Al(1)-Al(1) bond lengths are 2.82 Å.