MgCu2(PbO2)2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Pb(1) is bonded in a 4-coordinate geometry to two equivalent 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 5-coordinate geometry to one Mg(1), one Cu(1), one Cu(2), and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Cu(1), one Cu(2), and two equivalent Pb(1) atoms.
MgCu2(PbO2)2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Mg(1)-O(1) bond lengths are 2.03 Å. Both Mg(1)-O(2) bond lengths are 2.02 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 2.13 Å. Both Cu(1)-O(2) bond lengths are 2.15 Å. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(2)-O(1) bond lengths are 2.08 Å. Both Cu(2)-O(2) bond lengths are 2.10 Å. Pb(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There is one shorter (2.29 Å) and one longer (2.72 Å) Pb(1)-O(1) bond length. There is one shorter (2.29 Å) and one longer (2.68 Å) Pb(1)-O(2) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Mg(1), one Cu(1), one Cu(2), and two equivalent Pb(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Cu(1), one Cu(2), and two equivalent Pb(1) atoms.