Mg2W2O5 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form corner-sharing MgO4 trigonal pyramids. In the second Mg site, Mg(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form distorted corner-sharing MgO4 trigonal pyramids. There are two inequivalent W sites. In the first W site, W(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(5) atoms. In the second W site, W(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mg(2) and one W(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent Mg(2) and two equivalent W(2) atoms to form distorted corner-sharing OMg2W2 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Mg(1) and two equivalent W(1) atoms to form distorted corner-sharing OMg2W2 tetrahedra.
Mg2W2O5 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent O(3) and two equivalent O(5) atoms to form corner-sharing MgO4 trigonal pyramids. There is one shorter (1.94 Å) and one longer (1.95 Å) Mg(1)-O(3) bond length. There is one shorter (2.00 Å) and one longer (2.10 Å) Mg(1)-O(5) bond length. In the second Mg site, Mg(2) is bonded to two equivalent O(2) and two equivalent O(4) atoms to form distorted corner-sharing MgO4 trigonal pyramids. There is one shorter (1.96 Å) and one longer (1.97 Å) Mg(2)-O(2) bond length. There is one shorter (2.00 Å) and one longer (2.10 Å) Mg(2)-O(4) bond length. There are two inequivalent W sites. In the first W site, W(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(5) atoms. The W(1)-O(1) bond length is 1.97 Å. The W(1)-O(3) bond length is 2.01 Å. There is one shorter (2.11 Å) and one longer (2.15 Å) W(1)-O(5) bond length. In the second W site, W(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(4) atoms. The W(2)-O(1) bond length is 1.96 Å. The W(2)-O(2) bond length is 2.03 Å. There is one shorter (2.09 Å) and one longer (2.12 Å) W(2)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one W(1) and one W(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mg(2) and one W(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent Mg(2) and two equivalent W(2) atoms to form distorted corner-sharing OMg2W2 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Mg(1) and two equivalent W(1) atoms to form distorted corner-sharing OMg2W2 tetrahedra.