YCuMg crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Cu(1) and two equivalent Cu(2) atoms. Y(1) is bonded in a 5-coordinate geometry to one Cu(2) and four equivalent Cu(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Y(1) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Y(1) atoms.
YCuMg crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent Cu(1) and two equivalent Cu(2) atoms. Both Mg(1)-Cu(1) bond lengths are 2.89 Å. Both Mg(1)-Cu(2) bond lengths are 2.68 Å. Y(1) is bonded in a 5-coordinate geometry to one Cu(2) and four equivalent Cu(1) atoms. The Y(1)-Cu(2) bond length is 3.08 Å. All Y(1)-Cu(1) bond lengths are 3.00 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Y(1) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Y(1) atoms.