MgO is Moissanite-4H structured and crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and three equivalent O(2) atoms to form corner-sharing MgO4 tetrahedra. In the second Mg site, Mg(2) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing MgO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and three equivalent Mg(2) atoms to form corner-sharing OMg4 tetrahedra. In the second O site, O(2) is bonded to one Mg(2) and three equivalent Mg(1) atoms to form corner-sharing OMg4 tetrahedra.
MgO is Moissanite-4H structured and crystallizes in the hexagonal P6_3mc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and three equivalent O(2) atoms to form corner-sharing MgO4 tetrahedra. The Mg(1)-O(1) bond length is 1.97 Å. All Mg(1)-O(2) bond lengths are 1.98 Å. In the second Mg site, Mg(2) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing MgO4 tetrahedra. The Mg(2)-O(2) bond length is 1.99 Å. All Mg(2)-O(1) bond lengths are 1.97 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and three equivalent Mg(2) atoms to form corner-sharing OMg4 tetrahedra. In the second O site, O(2) is bonded to one Mg(2) and three equivalent Mg(1) atoms to form corner-sharing OMg4 tetrahedra.