The material described by Mn2O3 crystallizes in the orthorhombic Pna2_1 space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with three equivalent Mn(2)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with three equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-51°. In the second Mn site, Mn(2) is bonded to one O(1), one O(6), and two equivalent O(3) atoms to form MnO4 tetrahedra that share  a cornercorner with one Mn(4)O6 octahedra, corners with three equivalent Mn(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra, and corners with two equivalent Mn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-71°. In the third Mn site, Mn(3) 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 distorted MnO6 octahedra that share corners with four equivalent Mn(4)O6 octahedra, corners with four equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra, and edges with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-55°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(4) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(2)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-55°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Mn(4) atom to form OMn4 tetrahedra that share  a cornercorner with one O(2)Mn5 square pyramid, corners with two equivalent O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, and  an edgeedge with one O(6)Mn4 tetrahedra. In the second O site, O(2) is bonded to one Mn(3), two equivalent Mn(1), and two equivalent Mn(4) atoms to form OMn5 square pyramids that share  a cornercorner with one O(1)Mn4 tetrahedra,  a cornercorner with one O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, edges with two equivalent O(1)Mn4 tetrahedra, and edges with two equivalent O(6)Mn4 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(3) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(3) and two equivalent Mn(4) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(3), and two equivalent Mn(1) atoms to form OMn4 tetrahedra that share  a cornercorner with one O(2)Mn5 square pyramid, corners with two equivalent O(1)Mn4 tetrahedra, corners with two equivalent O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, and  an edgeedge with one O(1)Mn4 tetrahedra. is represented by the CIF file [CIF]
data_Mn2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.304
_cell_length_b   8.871
_cell_length_c   9.567
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   450.158
_cell_formula_units_Z   8
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Mn  Mn0  1  0.171  0.662  0.872  1.0
  Mn  Mn1  1  0.185  0.348  0.054  1.0
  Mn  Mn2  1  0.165  0.018  0.863  1.0
  Mn  Mn3  1  0.175  0.340  0.643  1.0
  Mn  Mn4  1  0.315  0.848  0.554  1.0
  Mn  Mn5  1  0.335  0.518  0.363  1.0
  Mn  Mn6  1  0.325  0.840  0.143  1.0
  Mn  Mn7  1  0.329  0.162  0.372  1.0
  Mn  Mn8  1  0.675  0.160  0.643  1.0
  Mn  Mn9  1  0.665  0.482  0.863  1.0
  Mn  Mn10  1  0.671  0.838  0.872  1.0
  Mn  Mn11  1  0.685  0.152  0.054  1.0
  Mn  Mn12  1  0.815  0.652  0.554  1.0
  Mn  Mn13  1  0.825  0.660  0.143  1.0
  Mn  Mn14  1  0.835  0.982  0.363  1.0
  Mn  Mn15  1  0.829  0.338  0.372  1.0
  O  O16  1  0.968  0.519  0.995  1.0
  O  O17  1  0.028  0.820  0.996  1.0
  O  O18  1  0.032  0.481  0.495  1.0
  O  O19  1  0.033  0.160  0.992  1.0
  O  O20  1  0.967  0.840  0.492  1.0
  O  O21  1  0.972  0.180  0.496  1.0
  O  O22  1  0.163  0.669  0.234  1.0
  O  O23  1  0.166  0.001  0.272  1.0
  O  O24  1  0.181  0.337  0.265  1.0
  O  O25  1  0.334  0.501  0.772  1.0
  O  O26  1  0.319  0.837  0.765  1.0
  O  O27  1  0.337  0.169  0.734  1.0
  O  O28  1  0.528  0.680  0.996  1.0
  O  O29  1  0.467  0.660  0.492  1.0
  O  O30  1  0.533  0.340  0.992  1.0
  O  O31  1  0.472  0.320  0.496  1.0
  O  O32  1  0.532  0.019  0.495  1.0
  O  O33  1  0.468  0.981  0.995  1.0
  O  O34  1  0.666  0.499  0.272  1.0
  O  O35  1  0.663  0.831  0.234  1.0
  O  O36  1  0.681  0.163  0.265  1.0
  O  O37  1  0.819  0.663  0.765  1.0
  O  O38  1  0.834  0.999  0.772  1.0
  O  O39  1  0.837  0.331  0.734  1.0
[/CIF]
.
The material described by Mn2O3 crystallizes in the orthorhombic Pna2_1 space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Mn(4)O6 octahedra, corners with three equivalent Mn(2)O4 tetrahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with three equivalent Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-51°. In the second Mn site, Mn(2) is bonded to one O(1), one O(6), and two equivalent O(3) atoms to form MnO4 tetrahedra that share  a cornercorner with one Mn(4)O6 octahedra, corners with three equivalent Mn(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra, and corners with two equivalent Mn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-71°. In the third Mn site, Mn(3) 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 distorted MnO6 octahedra that share corners with four equivalent Mn(4)O6 octahedra, corners with four equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Mn(4)O6 octahedra, and edges with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-55°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(4) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(2)O4 tetrahedra,  an edgeedge with one Mn(3)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-55°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Mn(4) atom to form OMn4 tetrahedra that share  a cornercorner with one O(2)Mn5 square pyramid, corners with two equivalent O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, and  an edgeedge with one O(6)Mn4 tetrahedra. In the second O site, O(2) is bonded to one Mn(3), two equivalent Mn(1), and two equivalent Mn(4) atoms to form OMn5 square pyramids that share  a cornercorner with one O(1)Mn4 tetrahedra,  a cornercorner with one O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, edges with two equivalent O(1)Mn4 tetrahedra, and edges with two equivalent O(6)Mn4 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(3) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mn(3) and two equivalent Mn(4) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(3), and two equivalent Mn(1) atoms to form OMn4 tetrahedra that share  a cornercorner with one O(2)Mn5 square pyramid, corners with two equivalent O(1)Mn4 tetrahedra, corners with two equivalent O(6)Mn4 tetrahedra, edges with two equivalent O(2)Mn5 square pyramids, and  an edgeedge with one O(1)Mn4 tetrahedra. is represented by the CIF file [CIF]
data_Mn2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.304
_cell_length_b   8.871
_cell_length_c   9.567
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   450.158
_cell_formula_units_Z   8
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Mn  Mn0  1  0.171  0.662  0.872  1.0
  Mn  Mn1  1  0.185  0.348  0.054  1.0
  Mn  Mn2  1  0.165  0.018  0.863  1.0
  Mn  Mn3  1  0.175  0.340  0.643  1.0
  Mn  Mn4  1  0.315  0.848  0.554  1.0
  Mn  Mn5  1  0.335  0.518  0.363  1.0
  Mn  Mn6  1  0.325  0.840  0.143  1.0
  Mn  Mn7  1  0.329  0.162  0.372  1.0
  Mn  Mn8  1  0.675  0.160  0.643  1.0
  Mn  Mn9  1  0.665  0.482  0.863  1.0
  Mn  Mn10  1  0.671  0.838  0.872  1.0
  Mn  Mn11  1  0.685  0.152  0.054  1.0
  Mn  Mn12  1  0.815  0.652  0.554  1.0
  Mn  Mn13  1  0.825  0.660  0.143  1.0
  Mn  Mn14  1  0.835  0.982  0.363  1.0
  Mn  Mn15  1  0.829  0.338  0.372  1.0
  O  O16  1  0.968  0.519  0.995  1.0
  O  O17  1  0.028  0.820  0.996  1.0
  O  O18  1  0.032  0.481  0.495  1.0
  O  O19  1  0.033  0.160  0.992  1.0
  O  O20  1  0.967  0.840  0.492  1.0
  O  O21  1  0.972  0.180  0.496  1.0
  O  O22  1  0.163  0.669  0.234  1.0
  O  O23  1  0.166  0.001  0.272  1.0
  O  O24  1  0.181  0.337  0.265  1.0
  O  O25  1  0.334  0.501  0.772  1.0
  O  O26  1  0.319  0.837  0.765  1.0
  O  O27  1  0.337  0.169  0.734  1.0
  O  O28  1  0.528  0.680  0.996  1.0
  O  O29  1  0.467  0.660  0.492  1.0
  O  O30  1  0.533  0.340  0.992  1.0
  O  O31  1  0.472  0.320  0.496  1.0
  O  O32  1  0.532  0.019  0.495  1.0
  O  O33  1  0.468  0.981  0.995  1.0
  O  O34  1  0.666  0.499  0.272  1.0
  O  O35  1  0.663  0.831  0.234  1.0
  O  O36  1  0.681  0.163  0.265  1.0
  O  O37  1  0.819  0.663  0.765  1.0
  O  O38  1  0.834  0.999  0.772  1.0
  O  O39  1  0.837  0.331  0.734  1.0
[/CIF]
.