The material structure described by CrO crystallizes in the monoclinic Pm space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the third Cr site, Cr(3) is bonded in a square co-planar geometry to four equivalent O(2) atoms. In the fourth Cr site, Cr(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cr(1) and two equivalent Cr(4) atoms. In the second O site, O(2) is bonded to two equivalent Cr(1) and two equivalent Cr(3) atoms to form a mixture of distorted corner and edge-sharing OCr4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Cr(2) and two equivalent Cr(4) atoms to form a mixture of distorted corner and edge-sharing OCr4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.614
_cell_length_b   3.030
_cell_length_c   3.147
_cell_angle_alpha   68.403
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   147.325
_cell_formula_units_Z   6
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  0.334  0.453  0.125  1.0
  Cr  Cr1  1  0.000  0.046  0.339  1.0
  Cr  Cr2  1  0.666  0.453  0.125  1.0
  Cr  Cr3  1  0.500  0.949  0.682  1.0
  Cr  Cr4  1  0.834  0.549  0.869  1.0
  Cr  Cr5  1  0.166  0.549  0.869  1.0
  O  O6  1  0.251  0.011  0.972  1.0
  O  O7  1  0.418  0.931  0.189  1.0
  O  O8  1  0.582  0.931  0.189  1.0
  O  O9  1  0.749  0.011  0.972  1.0
  O  O10  1  0.917  0.063  0.830  1.0
  O  O11  1  0.083  0.063  0.830  1.0
[/CIF]
.
The material structure described by CrO crystallizes in the monoclinic Pm space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the third Cr site, Cr(3) is bonded in a square co-planar geometry to four equivalent O(2) atoms. In the fourth Cr site, Cr(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cr(1) and two equivalent Cr(4) atoms. In the second O site, O(2) is bonded to two equivalent Cr(1) and two equivalent Cr(3) atoms to form a mixture of distorted corner and edge-sharing OCr4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Cr(2) and two equivalent Cr(4) atoms to form a mixture of distorted corner and edge-sharing OCr4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_CrO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.614
_cell_length_b   3.030
_cell_length_c   3.147
_cell_angle_alpha   68.403
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   147.325
_cell_formula_units_Z   6
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  0.334  0.453  0.125  1.0
  Cr  Cr1  1  0.000  0.046  0.339  1.0
  Cr  Cr2  1  0.666  0.453  0.125  1.0
  Cr  Cr3  1  0.500  0.949  0.682  1.0
  Cr  Cr4  1  0.834  0.549  0.869  1.0
  Cr  Cr5  1  0.166  0.549  0.869  1.0
  O  O6  1  0.251  0.011  0.972  1.0
  O  O7  1  0.418  0.931  0.189  1.0
  O  O8  1  0.582  0.931  0.189  1.0
  O  O9  1  0.749  0.011  0.972  1.0
  O  O10  1  0.917  0.063  0.830  1.0
  O  O11  1  0.083  0.063  0.830  1.0
[/CIF]
.