Mg2WSnO6 crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Mg(2)O5 trigonal bipyramids, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 48°. In the second Mg site, Mg(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 36°. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, edges with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent Mg(2)O5 trigonal bipyramids. Sn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mg(2), one W(1), and one Sn(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Mg(2), and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Mg(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(2), one W(1), and one Sn(1) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Mg(1), one W(1), and one Sn(1) atom.
Mg2WSnO6 crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Mg(2)O5 trigonal bipyramids, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 48°. The Mg(1)-O(1) bond length is 2.25 Å. The Mg(1)-O(2) bond length is 2.05 Å. The Mg(1)-O(3) bond length is 2.05 Å. The Mg(1)-O(4) bond length is 2.13 Å. The Mg(1)-O(6) bond length is 2.02 Å. In the second Mg site, Mg(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, edges with two equivalent W(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 36°. The Mg(2)-O(1) bond length is 2.11 Å. The Mg(2)-O(2) bond length is 2.10 Å. The Mg(2)-O(3) bond length is 2.12 Å. The Mg(2)-O(4) bond length is 2.04 Å. The Mg(2)-O(5) bond length is 2.07 Å. W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, edges with two equivalent Mg(1)O5 trigonal bipyramids, and edges with two equivalent Mg(2)O5 trigonal bipyramids. The W(1)-O(1) bond length is 2.02 Å. The W(1)-O(2) bond length is 1.98 Å. The W(1)-O(3) bond length is 1.88 Å. The W(1)-O(4) bond length is 1.88 Å. The W(1)-O(5) bond length is 2.03 Å. The W(1)-O(6) bond length is 2.01 Å. Sn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(5), and one O(6) atom. The Sn(1)-O(1) bond length is 2.49 Å. The Sn(1)-O(5) bond length is 2.11 Å. The Sn(1)-O(6) bond length is 2.12 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mg(2), one W(1), and one Sn(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Mg(2), and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mg(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Mg(2), and one W(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(2), one W(1), and one Sn(1) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Mg(1), one W(1), and one Sn(1) atom.