MgO crystallizes in the monoclinic C2/c space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form a mixture of corner and edge-sharing MgO4 trigonal pyramids. In the second Mg site, Mg(2) is bonded in a distorted see-saw-like geometry to one O(3) and three equivalent O(1) atoms. In the third Mg site, Mg(3) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing MgO4 trigonal pyramids. There are three inequivalent O sites. In the first O site, O(3) is bonded to one Mg(2), one Mg(3), and two equivalent Mg(1) atoms to form a mixture of corner and edge-sharing OMg4 trigonal pyramids. In the second O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(3) and three equivalent Mg(2) atoms. In the third O site, O(2) is bonded to two equivalent Mg(1) and two equivalent Mg(3) atoms to form a mixture of corner and edge-sharing OMg4 trigonal pyramids.
MgO crystallizes in the monoclinic C2/c space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form a mixture of corner and edge-sharing MgO4 trigonal pyramids. There is one shorter (1.95 Å) and one longer (1.99 Å) Mg(1)-O(2) bond length. There is one shorter (1.98 Å) and one longer (2.09 Å) Mg(1)-O(3) bond length. In the second Mg site, Mg(2) is bonded in a distorted see-saw-like geometry to one O(3) and three equivalent O(1) atoms. The Mg(2)-O(3) bond length is 1.95 Å. There are a spread of Mg(2)-O(1) bond distances ranging from 2.01-2.03 Å. In the third Mg site, Mg(3) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form a mixture of corner and edge-sharing MgO4 trigonal pyramids. The Mg(3)-O(1) bond length is 1.95 Å. The Mg(3)-O(3) bond length is 1.99 Å. There is one shorter (1.98 Å) and one longer (2.08 Å) Mg(3)-O(2) bond length. There are three inequivalent O sites. In the first O site, O(3) is bonded to one Mg(2), one Mg(3), and two equivalent Mg(1) atoms to form a mixture of corner and edge-sharing OMg4 trigonal pyramids. In the second O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(3) and three equivalent Mg(2) atoms. In the third O site, O(2) is bonded to two equivalent Mg(1) and two equivalent Mg(3) atoms to form a mixture of corner and edge-sharing OMg4 trigonal pyramids.