Mn2O3 is Hausmannite-like structured and crystallizes in the orthorhombic Pbca space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-61°. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. In the third Mn site, Mn(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fourth Mn site, Mn(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form a mixture of edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-61°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the fourth O site, O(4) is bonded to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom to form distorted corner-sharing OMn4 tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom.
Mn2O3 is Hausmannite-like structured and crystallizes in the orthorhombic Pbca space group. There are five inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-61°. The Mn(1)-O(1) bond length is 1.92 Å. The Mn(1)-O(2) bond length is 2.22 Å. The Mn(1)-O(3) bond length is 1.99 Å. The Mn(1)-O(4) bond length is 2.01 Å. The Mn(1)-O(5) bond length is 2.28 Å. The Mn(1)-O(6) bond length is 2.05 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-60°. The Mn(2)-O(1) bond length is 2.02 Å. The Mn(2)-O(2) bond length is 1.94 Å. The Mn(2)-O(3) bond length is 2.03 Å. The Mn(2)-O(4) bond length is 2.29 Å. The Mn(2)-O(5) bond length is 1.98 Å. The Mn(2)-O(6) bond length is 2.24 Å. In the third Mn site, Mn(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. Both Mn(3)-O(2) bond lengths are 2.12 Å. Both Mn(3)-O(3) bond lengths are 1.99 Å. Both Mn(3)-O(6) bond lengths are 2.03 Å. In the fourth Mn site, Mn(4) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form a mixture of edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. Both Mn(4)-O(1) bond lengths are 2.12 Å. Both Mn(4)-O(4) bond lengths are 2.02 Å. Both Mn(4)-O(5) bond lengths are 1.99 Å. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form a mixture of distorted edge and corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 48-61°. The Mn(5)-O(1) bond length is 2.21 Å. The Mn(5)-O(2) bond length is 2.01 Å. The Mn(5)-O(3) bond length is 2.32 Å. The Mn(5)-O(4) bond length is 1.97 Å. The Mn(5)-O(5) bond length is 2.06 Å. The Mn(5)-O(6) bond length is 1.95 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the fourth O site, O(4) is bonded to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom to form distorted corner-sharing OMn4 tetrahedra. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(5) atom.