MgOFe2O2 is Caswellsilverite-like structured and crystallizes in the orthorhombic Fmmm space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Fe(1)O6 octahedra. The corner-sharing octahedra are not tilted. Fe(1) is bonded to one O(1) and five equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with five equivalent Fe(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are two inequivalent O sites. In the first O site, O(2) is bonded to one Mg(1) and five equivalent Fe(1) atoms to form OMgFe5 octahedra that share  a cornercorner with one O(1)Mg4Fe2 octahedra, corners with five equivalent O(2)MgFe5 octahedra, edges with four equivalent O(1)Mg4Fe2 octahedra, and edges with eight equivalent O(2)MgFe5 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the second O site, O(1) is bonded to four equivalent Mg(1) and two equivalent Fe(1) atoms to form OMg4Fe2 octahedra that share corners with two equivalent O(2)MgFe5 octahedra, corners with four equivalent O(1)Mg4Fe2 octahedra, edges with four equivalent O(1)Mg4Fe2 octahedra, and edges with eight equivalent O(2)MgFe5 octahedra. The corner-sharing octahedra are not tilted.
MgOFe2O2 is Caswellsilverite-like structured and crystallizes in the orthorhombic Fmmm space group. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Mg(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Fe(1)O6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(1)-O(2) bond lengths are 2.17 Å. There are two shorter (2.11 Å) and two longer (2.21 Å) Mg(1)-O(1) bond lengths. Fe(1) is bonded to one O(1) and five equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra, corners with five equivalent Fe(1)O6 octahedra, edges with four equivalent Mg(1)O6 octahedra, and edges with eight equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Fe(1)-O(1) bond length is 2.20 Å. There are a spread of Fe(1)-O(2) bond distances ranging from 2.11-2.28 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded to one Mg(1) and five equivalent Fe(1) atoms to form OMgFe5 octahedra that share  a cornercorner with one O(1)Mg4Fe2 octahedra, corners with five equivalent O(2)MgFe5 octahedra, edges with four equivalent O(1)Mg4Fe2 octahedra, and edges with eight equivalent O(2)MgFe5 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the second O site, O(1) is bonded to four equivalent Mg(1) and two equivalent Fe(1) atoms to form OMg4Fe2 octahedra that share corners with two equivalent O(2)MgFe5 octahedra, corners with four equivalent O(1)Mg4Fe2 octahedra, edges with four equivalent O(1)Mg4Fe2 octahedra, and edges with eight equivalent O(2)MgFe5 octahedra. The corner-sharing octahedra are not tilted.