The material described by Cr3B4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 7-coordinate geometry to two equivalent B(1) and five equivalent B(2) atoms. In the second Cr site, Cr(2) is bonded to four equivalent B(2) and eight equivalent B(1) atoms to form a mixture of face and edge-sharing CrB12 cuboctahedra. There are two inequivalent B sites. In the first B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Cr(2), five equivalent Cr(1), and two equivalent B(1) atoms. In the second B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Cr(1), four equivalent Cr(2), one B(1), and two equivalent B(2) atoms. is represented by the CIF file [CIF]
data_Cr3B4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.925
_cell_length_b   2.898
_cell_length_c   6.806
_cell_angle_alpha   102.297
_cell_angle_beta   102.407
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   54.979
_cell_formula_units_Z   1
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  0.186  0.186  0.372  1.0
  Cr  Cr1  1  0.814  0.814  0.628  1.0
  Cr  Cr2  1  0.500  0.000  0.000  1.0
  B  B3  1  0.934  0.433  0.867  1.0
  B  B4  1  0.066  0.567  0.133  1.0
  B  B5  1  0.360  0.359  0.719  1.0
  B  B6  1  0.640  0.641  0.281  1.0
[/CIF]
.
The material described by Cr3B4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 7-coordinate geometry to two equivalent B(1) and five equivalent B(2) atoms. In the second Cr site, Cr(2) is bonded to four equivalent B(2) and eight equivalent B(1) atoms to form a mixture of face and edge-sharing CrB12 cuboctahedra. There are two inequivalent B sites. In the first B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Cr(2), five equivalent Cr(1), and two equivalent B(1) atoms. In the second B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Cr(1), four equivalent Cr(2), one B(1), and two equivalent B(2) atoms. is represented by the CIF file [CIF]
data_Cr3B4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.925
_cell_length_b   2.898
_cell_length_c   6.806
_cell_angle_alpha   102.297
_cell_angle_beta   102.407
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   54.979
_cell_formula_units_Z   1
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  0.186  0.186  0.372  1.0
  Cr  Cr1  1  0.814  0.814  0.628  1.0
  Cr  Cr2  1  0.500  0.000  0.000  1.0
  B  B3  1  0.934  0.433  0.867  1.0
  B  B4  1  0.066  0.567  0.133  1.0
  B  B5  1  0.360  0.359  0.719  1.0
  B  B6  1  0.640  0.641  0.281  1.0
[/CIF]
.