The material structure described by Cr2O3 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent O(2) and three equivalent O(1) atoms to form a mixture of corner and edge-sharing CrO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to three equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a see-saw-like geometry to four equivalent Cr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.784
_cell_length_b   5.252
_cell_length_c   6.227
_cell_angle_alpha   120.553
_cell_angle_beta   149.983
_cell_angle_gamma   54.050
_symmetry_Int_Tables_number   1
_cell_volume   142.819
_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
  Cr  Cr0  1  0.740  0.232  0.780  1.0
  Cr  Cr1  1  0.260  0.768  0.220  1.0
  Cr  Cr2  1  0.960  0.732  0.220  1.0
  Cr  Cr3  1  0.040  0.268  0.780  1.0
  O  O4  1  0.628  0.693  0.786  1.0
  O  O5  1  0.076  0.250  0.152  1.0
  O  O6  1  0.158  0.807  0.786  1.0
  O  O7  1  0.372  0.307  0.214  1.0
  O  O8  1  0.924  0.750  0.848  1.0
  O  O9  1  0.842  0.193  0.214  1.0
[/CIF]
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The material structure described by Cr2O3 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent O(2) and three equivalent O(1) atoms to form a mixture of corner and edge-sharing CrO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to three equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a see-saw-like geometry to four equivalent Cr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.784
_cell_length_b   5.252
_cell_length_c   6.227
_cell_angle_alpha   120.553
_cell_angle_beta   149.983
_cell_angle_gamma   54.050
_symmetry_Int_Tables_number   1
_cell_volume   142.819
_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
  Cr  Cr0  1  0.740  0.232  0.780  1.0
  Cr  Cr1  1  0.260  0.768  0.220  1.0
  Cr  Cr2  1  0.960  0.732  0.220  1.0
  Cr  Cr3  1  0.040  0.268  0.780  1.0
  O  O4  1  0.628  0.693  0.786  1.0
  O  O5  1  0.076  0.250  0.152  1.0
  O  O6  1  0.158  0.807  0.786  1.0
  O  O7  1  0.372  0.307  0.214  1.0
  O  O8  1  0.924  0.750  0.848  1.0
  O  O9  1  0.842  0.193  0.214  1.0
[/CIF]
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