The crystal structure described by Cr crystallizes in the cubic Pm-3n space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to twelve equivalent Cr(2) atoms to form a mixture of edge and face-sharing CrCr12 cuboctahedra. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to four equivalent Cr(1) and ten equivalent Cr(2) atoms. is represented by the CIF file [CIF]
data_Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.512
_cell_length_b   4.512
_cell_length_c   4.512
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   91.868
_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
  Cr  Cr0  1  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.500  0.500  0.500  1.0
  Cr  Cr2  1  0.250  0.000  0.500  1.0
  Cr  Cr3  1  0.750  0.000  0.500  1.0
  Cr  Cr4  1  0.000  0.500  0.250  1.0
  Cr  Cr5  1  0.000  0.500  0.750  1.0
  Cr  Cr6  1  0.500  0.750  0.000  1.0
  Cr  Cr7  1  0.500  0.250  0.000  1.0
[/CIF]
.
The crystal structure described by Cr crystallizes in the cubic Pm-3n space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to twelve equivalent Cr(2) atoms to form a mixture of edge and face-sharing CrCr12 cuboctahedra. In the second Cr site, Cr(2) is bonded in a 14-coordinate geometry to four equivalent Cr(1) and ten equivalent Cr(2) atoms. is represented by the CIF file [CIF]
data_Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.512
_cell_length_b   4.512
_cell_length_c   4.512
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   91.868
_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
  Cr  Cr0  1  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.500  0.500  0.500  1.0
  Cr  Cr2  1  0.250  0.000  0.500  1.0
  Cr  Cr3  1  0.750  0.000  0.500  1.0
  Cr  Cr4  1  0.000  0.500  0.250  1.0
  Cr  Cr5  1  0.000  0.500  0.750  1.0
  Cr  Cr6  1  0.500  0.750  0.000  1.0
  Cr  Cr7  1  0.500  0.250  0.000  1.0
[/CIF]
.