MgCeCu crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to six equivalent Ce(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. Ce(1) is bonded in a 11-coordinate geometry to six equivalent Mg(1), one Cu(2), and four equivalent Cu(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Ce(1) atoms. In the second Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Ce(1) atoms.
MgCeCu crystallizes in the hexagonal P-62m space group. Mg(1) is bonded in a 4-coordinate geometry to six equivalent Ce(1), two equivalent Cu(1), and two equivalent Cu(2) atoms. There are two shorter (3.35 Å) and four longer (3.50 Å) Mg(1)-Ce(1) bond lengths. Both Mg(1)-Cu(1) bond lengths are 2.99 Å. Both Mg(1)-Cu(2) bond lengths are 2.77 Å. Ce(1) is bonded in a 11-coordinate geometry to six equivalent Mg(1), one Cu(2), and four equivalent Cu(1) atoms. The Ce(1)-Cu(2) bond length is 3.23 Å. All Ce(1)-Cu(1) bond lengths are 3.10 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Mg(1) and three equivalent Ce(1) atoms. In the second Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Mg(1) and six equivalent Ce(1) atoms.