MgO crystallizes in the orthorhombic Ibam space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and four equivalent O(2) atoms to form a mixture of corner and edge-sharing MgO5 trigonal bipyramids. In the second Mg site, Mg(2) is bonded to one O(2) and four equivalent O(1) atoms to form a mixture of corner and edge-sharing MgO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and four equivalent Mg(2) atoms to form a mixture of corner and edge-sharing OMg5 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(2) and four equivalent Mg(1) atoms to form a mixture of corner and edge-sharing OMg5 trigonal bipyramids.
MgO crystallizes in the orthorhombic Ibam space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1) and four equivalent O(2) atoms to form a mixture of corner and edge-sharing MgO5 trigonal bipyramids. The Mg(1)-O(1) bond length is 2.01 Å. There are a spread of Mg(1)-O(2) bond distances ranging from 2.04-2.08 Å. In the second Mg site, Mg(2) is bonded to one O(2) and four equivalent O(1) atoms to form a mixture of corner and edge-sharing MgO5 trigonal bipyramids. The Mg(2)-O(2) bond length is 2.00 Å. There are a spread of Mg(2)-O(1) bond distances ranging from 2.01-2.08 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1) and four equivalent Mg(2) atoms to form a mixture of corner and edge-sharing OMg5 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(2) and four equivalent Mg(1) atoms to form a mixture of corner and edge-sharing OMg5 trigonal bipyramids.