The material described by MnO3 crystallizes in the orthorhombic Imma space group. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one O(2) atom. is represented by the CIF card [CIF]
data_MnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.973
_cell_length_b   4.973
_cell_length_c   4.973
_cell_angle_alpha   116.786
_cell_angle_beta   110.224
_cell_angle_gamma   101.750
_symmetry_Int_Tables_number   1
_cell_volume   93.066
_cell_formula_units_Z   2
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  0.500  0.500  0.000  1.0
  Mn  Mn1  1  0.000  0.000  0.000  1.0
  O  O2  1  0.750  0.566  0.816  1.0
  O  O3  1  0.250  0.434  0.184  1.0
  O  O4  1  0.109  0.109  0.500  1.0
  O  O5  1  0.391  0.891  0.000  1.0
  O  O6  1  0.609  0.109  0.000  1.0
  O  O7  1  0.891  0.891  0.500  1.0
[/CIF]
.
The material described by MnO3 crystallizes in the orthorhombic Imma space group. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 49-63°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one O(2) atom. is represented by the CIF card [CIF]
data_MnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.973
_cell_length_b   4.973
_cell_length_c   4.973
_cell_angle_alpha   116.786
_cell_angle_beta   110.224
_cell_angle_gamma   101.750
_symmetry_Int_Tables_number   1
_cell_volume   93.066
_cell_formula_units_Z   2
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  0.500  0.500  0.000  1.0
  Mn  Mn1  1  0.000  0.000  0.000  1.0
  O  O2  1  0.750  0.566  0.816  1.0
  O  O3  1  0.250  0.434  0.184  1.0
  O  O4  1  0.109  0.109  0.500  1.0
  O  O5  1  0.391  0.891  0.000  1.0
  O  O6  1  0.609  0.109  0.000  1.0
  O  O7  1  0.891  0.891  0.500  1.0
[/CIF]
.