CuOMgO crystallizes in the tetragonal I4_1/amd space group. Mg(1) is bonded to six O(1,1,1) atoms to form MgO6 octahedra that share corners with two equivalent Cu(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. Cu(1) is bonded to six O(1,1) atoms to form distorted CuO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cu(1)O6 octahedra, edges with four equivalent Cu(1)O6 octahedra, and edges with eight equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are five inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fourth O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the fifth O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°.
CuOMgO crystallizes in the tetragonal I4_1/amd space group. Mg(1) is bonded to six O(1,1,1) atoms to form MgO6 octahedra that share corners with two equivalent Cu(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four shorter (2.03 Å) and two longer (2.24 Å) Mg(1)-O(1,1,1) bond lengths. Cu(1) is bonded to six O(1,1) atoms to form distorted CuO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Cu(1)O6 octahedra, edges with four equivalent Cu(1)O6 octahedra, and edges with eight equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four shorter (2.03 Å) and two longer (2.59 Å) Cu(1)-O(1,1) bond lengths. There are five inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two shorter (2.03 Å) and one longer (2.59 Å) O(1)-Cu(1) bond length. In the second O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two shorter (2.03 Å) and one longer (2.59 Å) O(1)-Cu(1) bond length. In the fourth O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two shorter (2.03 Å) and one longer (2.24 Å) O(1)-Mg(1) bond length. There are two shorter (2.03 Å) and one longer (2.59 Å) O(1)-Cu(1) bond length. In the fifth O site, O(1) is bonded to three equivalent Mg(1) and three equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OMg3Cu3 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two shorter (2.03 Å) and one longer (2.24 Å) O(1)-Mg(1) bond length.