MgW2(OBr)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a body-centered cubic geometry to four equivalent Br(1) and four equivalent Br(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), two equivalent O(1), and two equivalent Br(1) atoms. In the second W site, W(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), two equivalent O(3), and two equivalent Br(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent W(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one W(1) and one W(2) atom. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(2) atoms. In the fourth O site, O(4) is bonded in a linear geometry to one W(1) and one W(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one W(1) atom. In the second Br site, Br(2) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one W(2) atom.
MgW2(OBr)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a body-centered cubic geometry to four equivalent Br(1) and four equivalent Br(2) atoms. There are two shorter (3.01 Å) and two longer (3.03 Å) Mg(1)-Br(1) bond lengths. There are two shorter (3.12 Å) and two longer (3.13 Å) Mg(1)-Br(2) bond lengths. There are two inequivalent W sites. In the first W site, W(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), two equivalent O(1), and two equivalent Br(1) atoms. The W(1)-O(2) bond length is 2.01 Å. The W(1)-O(4) bond length is 1.98 Å. Both W(1)-O(1) bond lengths are 1.93 Å. Both W(1)-Br(1) bond lengths are 2.67 Å. In the second W site, W(2) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(4), two equivalent O(3), and two equivalent Br(2) atoms. The W(2)-O(2) bond length is 1.89 Å. The W(2)-O(4) bond length is 1.88 Å. Both W(2)-O(3) bond lengths are 1.93 Å. Both W(2)-Br(2) bond lengths are 2.67 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent W(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one W(1) and one W(2) atom. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(2) atoms. In the fourth O site, O(4) is bonded in a linear geometry to one W(1) and one W(2) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one W(1) atom. In the second Br site, Br(2) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one W(2) atom.