Mg(WO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(11), one O(5), one O(8), and two equivalent O(10) atoms. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(2), one O(4), one O(9), and two equivalent O(12) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 8-31°. In the second W site, W(2) is bonded to one O(1), one O(10), one O(3), one O(6), and two equivalent O(8) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 19-36°. In the third W site, W(3) is bonded to one O(10), one O(2), one O(4), one O(6), and two equivalent O(5) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 18-36°. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(3), one O(9), and two equivalent O(7) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 5-31°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1) and two equivalent W(3) atoms. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(2) and one W(3) atom. In the seventh O site, O(7) is bonded in a linear geometry to two equivalent W(4) atoms. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent W(2) atoms. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one W(1) and one W(4) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to two equivalent Mg(1), one W(2), and one W(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one W(1), and one W(4) atom. In the twelfth O site, O(12) is bonded in a linear geometry to two equivalent W(1) atoms.
Mg(WO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(11), one O(5), one O(8), and two equivalent O(10) atoms. The Mg(1)-O(11) bond length is 2.26 Å. The Mg(1)-O(5) bond length is 2.29 Å. The Mg(1)-O(8) bond length is 2.06 Å. There is one shorter (2.12 Å) and one longer (2.24 Å) Mg(1)-O(10) bond length. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(2), one O(4), one O(9), and two equivalent O(12) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 8-31°. The W(1)-O(11) bond length is 2.01 Å. The W(1)-O(2) bond length is 2.04 Å. The W(1)-O(4) bond length is 1.88 Å. The W(1)-O(9) bond length is 1.86 Å. There is one shorter (1.89 Å) and one longer (2.02 Å) W(1)-O(12) bond length. In the second W site, W(2) is bonded to one O(1), one O(10), one O(3), one O(6), and two equivalent O(8) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 19-36°. The W(2)-O(1) bond length is 1.96 Å. The W(2)-O(10) bond length is 2.10 Å. The W(2)-O(3) bond length is 1.86 Å. The W(2)-O(6) bond length is 2.03 Å. There is one shorter (1.98 Å) and one longer (2.01 Å) W(2)-O(8) bond length. In the third W site, W(3) is bonded to one O(10), one O(2), one O(4), one O(6), and two equivalent O(5) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 18-36°. The W(3)-O(10) bond length is 2.01 Å. The W(3)-O(2) bond length is 1.86 Å. The W(3)-O(4) bond length is 2.03 Å. The W(3)-O(6) bond length is 1.84 Å. There is one shorter (1.94 Å) and one longer (2.01 Å) W(3)-O(5) bond length. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(3), one O(9), and two equivalent O(7) atoms to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 5-31°. The W(4)-O(1) bond length is 1.94 Å. The W(4)-O(11) bond length is 2.07 Å. The W(4)-O(3) bond length is 2.02 Å. The W(4)-O(9) bond length is 2.03 Å. There is one shorter (1.91 Å) and one longer (2.00 Å) W(4)-O(7) bond length. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(2) and one W(4) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1) and two equivalent W(3) atoms. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(2) and one W(3) atom. In the seventh O site, O(7) is bonded in a linear geometry to two equivalent W(4) atoms. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Mg(1) and two equivalent W(2) atoms. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one W(1) and one W(4) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to two equivalent Mg(1), one W(2), and one W(3) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one W(1), and one W(4) atom. In the twelfth O site, O(12) is bonded in a linear geometry to two equivalent W(1) atoms.