Fe2O3 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to twelve equivalent O(1) atoms to form FeO12 cuboctahedra that share corners with twelve equivalent Fe(1)O12 cuboctahedra, faces with six equivalent Fe(1)O12 cuboctahedra, and faces with eight equivalent Fe(2)O6 octahedra. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Fe(2)O6 octahedra and faces with eight equivalent Fe(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. O(1) is bonded in a distorted linear geometry to two equivalent Fe(2) and four equivalent Fe(1) atoms.
Fe2O3 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to twelve equivalent O(1) atoms to form FeO12 cuboctahedra that share corners with twelve equivalent Fe(1)O12 cuboctahedra, faces with six equivalent Fe(1)O12 cuboctahedra, and faces with eight equivalent Fe(2)O6 octahedra. All Fe(1)-O(1) bond lengths are 2.68 Å. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Fe(2)O6 octahedra and faces with eight equivalent Fe(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. All Fe(2)-O(1) bond lengths are 1.89 Å. O(1) is bonded in a distorted linear geometry to two equivalent Fe(2) and four equivalent Fe(1) atoms.