Fe2O3 is Hausmannite-like structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. In the second Fe site, Fe(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Fe(1) and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded to two equivalent Fe(1) and two equivalent Fe(2) atoms to form corner-sharing OFe4 trigonal pyramids.
Fe2O3 is Hausmannite-like structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. Both Fe(1)-O(2) bond lengths are 2.13 Å. There are two shorter (1.97 Å) and two longer (1.99 Å) Fe(1)-O(1) bond lengths. In the second Fe site, Fe(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. There is one shorter (2.01 Å) and one longer (2.08 Å) Fe(2)-O(2) bond length. There are two shorter (2.02 Å) and two longer (2.40 Å) Fe(2)-O(1) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Fe(1) and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded to two equivalent Fe(1) and two equivalent Fe(2) atoms to form corner-sharing OFe4 trigonal pyramids.