Mg2Sn3O8 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), and four equivalent O(3) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form edge-sharing SnO6 octahedra. In the second Sn site, Sn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing SnO6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent Sn(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Sn(1), and two equivalent Sn(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1), one Sn(1), and one Sn(2) atom to form a mixture of distorted corner and edge-sharing OMg2Sn2 tetrahedra.
Mg2Sn3O8 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), and four equivalent O(3) atoms. The Mg(1)-O(1) bond length is 2.09 Å. The Mg(1)-O(2) bond length is 2.38 Å. There are two shorter (2.15 Å) and two longer (2.38 Å) Mg(1)-O(3) bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form edge-sharing SnO6 octahedra. Both Sn(1)-O(2) bond lengths are 2.14 Å. All Sn(1)-O(3) bond lengths are 2.09 Å. In the second Sn site, Sn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing SnO6 octahedra. Both Sn(2)-O(1) bond lengths are 2.05 Å. Both Sn(2)-O(2) bond lengths are 2.15 Å. Both Sn(2)-O(3) bond lengths are 2.10 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent Sn(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Sn(1), and two equivalent Sn(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(1), one Sn(1), and one Sn(2) atom to form a mixture of distorted corner and edge-sharing OMg2Sn2 tetrahedra.