La2Cu2Mg crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent La(1) and four equivalent Cu(1) atoms to form a mixture of distorted face and corner-sharing MgLa8Cu4 cuboctahedra. La(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Cu(1) atoms. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent La(1), and one Cu(1) atom.
La2Cu2Mg crystallizes in the tetragonal P4/mbm space group. Mg(1) is bonded to eight equivalent La(1) and four equivalent Cu(1) atoms to form a mixture of distorted face and corner-sharing MgLa8Cu4 cuboctahedra. All Mg(1)-La(1) bond lengths are 3.53 Å. All Mg(1)-Cu(1) bond lengths are 3.16 Å. La(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and six equivalent Cu(1) atoms. There are two shorter (3.04 Å) and four longer (3.06 Å) La(1)-Cu(1) bond lengths. Cu(1) is bonded in a 9-coordinate geometry to two equivalent Mg(1), six equivalent La(1), and one Cu(1) atom. The Cu(1)-Cu(1) bond length is 2.70 Å.