MgLaCuO3 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. La(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. Cu(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one La(1), and one Cu(1) atom. In the second O site, O(2) is bonded to one Mg(1), two equivalent La(1), and one Cu(1) atom to form a mixture of distorted face and corner-sharing OLa2MgCu trigonal pyramids.
MgLaCuO3 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. The Mg(1)-O(1) bond length is 1.90 Å. Both Mg(1)-O(2) bond lengths are 1.99 Å. La(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(2) atoms. The La(1)-O(1) bond length is 2.42 Å. There are two shorter (2.29 Å) and two longer (2.55 Å) La(1)-O(2) bond lengths. Cu(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. The Cu(1)-O(1) bond length is 1.84 Å. Both Cu(1)-O(2) bond lengths are 2.17 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one La(1), and one Cu(1) atom. In the second O site, O(2) is bonded to one Mg(1), two equivalent La(1), and one Cu(1) atom to form a mixture of distorted face and corner-sharing OLa2MgCu trigonal pyramids.