The structure described by CrO crystallizes in the orthorhombic Pmm2 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 corner and edge-sharing OCr4 tetrahedra. 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 corner and edge-sharing OCr4 tetrahedra. is represented by the CIF file [CIF]
data_CrO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.005
_cell_length_b   3.156
_cell_length_c   16.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   156.225
_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  0.500  0.892  0.835  1.0
  Cr  Cr1  1  0.000  0.648  0.500  1.0
  Cr  Cr2  1  0.500  0.892  0.165  1.0
  Cr  Cr3  1  0.000  0.321  0.000  1.0
  Cr  Cr4  1  0.500  0.116  0.335  1.0
  Cr  Cr5  1  0.500  0.116  0.665  1.0
  O  O6  1  0.000  0.040  0.751  1.0
  O  O7  1  0.000  0.821  0.918  1.0
  O  O8  1  0.000  0.821  0.082  1.0
  O  O9  1  0.000  0.040  0.249  1.0
  O  O10  1  0.000  0.150  0.418  1.0
  O  O11  1  0.000  0.150  0.582  1.0
[/CIF]
.
The structure described by CrO crystallizes in the orthorhombic Pmm2 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 corner and edge-sharing OCr4 tetrahedra. 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 corner and edge-sharing OCr4 tetrahedra. is represented by the CIF file [CIF]
data_CrO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.005
_cell_length_b   3.156
_cell_length_c   16.476
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   156.225
_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  0.500  0.892  0.835  1.0
  Cr  Cr1  1  0.000  0.648  0.500  1.0
  Cr  Cr2  1  0.500  0.892  0.165  1.0
  Cr  Cr3  1  0.000  0.321  0.000  1.0
  Cr  Cr4  1  0.500  0.116  0.335  1.0
  Cr  Cr5  1  0.500  0.116  0.665  1.0
  O  O6  1  0.000  0.040  0.751  1.0
  O  O7  1  0.000  0.821  0.918  1.0
  O  O8  1  0.000  0.821  0.082  1.0
  O  O9  1  0.000  0.040  0.249  1.0
  O  O10  1  0.000  0.150  0.418  1.0
  O  O11  1  0.000  0.150  0.582  1.0
[/CIF]
.