Sr2MgTiO4 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to one O(2) and three equivalent O(1) atoms. Mg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(3) atoms. Ti(1) is bonded to one O(2) and four equivalent O(3) atoms to form distorted corner-sharing TiO5 square pyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), three equivalent Sr(2), and one Mg(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), four equivalent Sr(1), and one Ti(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Mg(1), and two equivalent Ti(1) atoms.
Sr2MgTiO4 crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(3) atoms. The Sr(1)-O(1) bond length is 2.61 Å. There are a spread of Sr(1)-O(2) bond distances ranging from 2.57-3.24 Å. There are two shorter (2.63 Å) and two longer (2.91 Å) Sr(1)-O(3) bond lengths. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to one O(2) and three equivalent O(1) atoms. The Sr(2)-O(2) bond length is 2.41 Å. There is one shorter (2.53 Å) and two longer (2.75 Å) Sr(2)-O(1) bond lengths. Mg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(3) atoms. The Mg(1)-O(1) bond length is 2.05 Å. Both Mg(1)-O(3) bond lengths are 2.14 Å. Ti(1) is bonded to one O(2) and four equivalent O(3) atoms to form distorted corner-sharing TiO5 square pyramids. The Ti(1)-O(2) bond length is 2.01 Å. There are two shorter (1.83 Å) and two longer (2.18 Å) Ti(1)-O(3) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Sr(1), three equivalent Sr(2), and one Mg(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), four equivalent Sr(1), and one Ti(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Mg(1), and two equivalent Ti(1) atoms.