MgW2Fe2(O4Cl)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to four equivalent O(1) and two equivalent Cl(1) atoms to form distorted MgCl2O4 octahedra that share corners with two equivalent Fe(1)Cl2O4 octahedra, corners with four equivalent W(1)O4 tetrahedra, and faces with two equivalent Fe(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles are 60°. W(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form WO4 tetrahedra that share corners with two equivalent Mg(1)Cl2O4 octahedra and corners with four equivalent Fe(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 26-50°. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent Cl(1) atoms to form distorted FeCl2O4 octahedra that share  a cornercorner with one Mg(1)Cl2O4 octahedra, corners with two equivalent Fe(1)Cl2O4 octahedra, corners with four equivalent W(1)O4 tetrahedra, and  a faceface with one Mg(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 11-60°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one Fe(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Fe(1) atom. Cl(1) is bonded in a distorted trigonal planar geometry to one Mg(1) and two equivalent Fe(1) atoms.
MgW2Fe2(O4Cl)2 crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to four equivalent O(1) and two equivalent Cl(1) atoms to form distorted MgCl2O4 octahedra that share corners with two equivalent Fe(1)Cl2O4 octahedra, corners with four equivalent W(1)O4 tetrahedra, and faces with two equivalent Fe(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles are 60°. All Mg(1)-O(1) bond lengths are 2.08 Å. Both Mg(1)-Cl(1) bond lengths are 2.53 Å. W(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form WO4 tetrahedra that share corners with two equivalent Mg(1)Cl2O4 octahedra and corners with four equivalent Fe(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 26-50°. Both W(1)-O(1) bond lengths are 1.84 Å. Both W(1)-O(2) bond lengths are 1.79 Å. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent Cl(1) atoms to form distorted FeCl2O4 octahedra that share  a cornercorner with one Mg(1)Cl2O4 octahedra, corners with two equivalent Fe(1)Cl2O4 octahedra, corners with four equivalent W(1)O4 tetrahedra, and  a faceface with one Mg(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 11-60°. Both Fe(1)-O(1) bond lengths are 2.20 Å. Both Fe(1)-O(2) bond lengths are 2.04 Å. Both Fe(1)-Cl(1) bond lengths are 2.61 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one Fe(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Fe(1) atom. Cl(1) is bonded in a distorted trigonal planar geometry to one Mg(1) and two equivalent Fe(1) atoms.