Mg(CuO2)4 is beta indium sulfide-derived structured and crystallizes in the cubic F-43m space group. Mg(1) is bonded to four equivalent O(2) atoms to form MgO4 tetrahedra that share corners with twelve equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 59°. Cu(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form CuO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with six equivalent Cu(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Cu(1) atoms. In the second O site, O(2) is bonded to one Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OMgCu3 trigonal pyramids.
Mg(CuO2)4 is beta indium sulfide-derived structured and crystallizes in the cubic F-43m space group. Mg(1) is bonded to four equivalent O(2) atoms to form MgO4 tetrahedra that share corners with twelve equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Mg(1)-O(2) bond lengths are 1.99 Å. Cu(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form CuO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra and edges with six equivalent Cu(1)O6 octahedra. All Cu(1)-O(1) bond lengths are 1.96 Å. All Cu(1)-O(2) bond lengths are 1.99 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Cu(1) atoms. In the second O site, O(2) is bonded to one Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OMgCu3 trigonal pyramids.