The compound described by Cr2B3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent B(3), four equivalent B(2), and six equivalent B(1) atoms to form a mixture of edge and face-sharing CrB12 cuboctahedra. In the second Cr site, Cr(2) is bonded in a 7-coordinate geometry to two equivalent B(2) and five equivalent B(3) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to six equivalent Cr(1), one B(2), and two equivalent B(1) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Cr(2), four equivalent Cr(1), one B(1), and two equivalent B(3) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Cr(1), five equivalent Cr(2), and two equivalent B(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2B3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.931
_cell_length_b   2.912
_cell_length_c   9.166
_cell_angle_alpha   99.139
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   77.231
_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  0.750  0.428  0.857  1.0
  Cr  Cr1  1  0.250  0.572  0.143  1.0
  Cr  Cr2  1  0.750  0.702  0.405  1.0
  Cr  Cr3  1  0.250  0.298  0.595  1.0
  B  B4  1  0.750  0.024  0.047  1.0
  B  B5  1  0.250  0.976  0.953  1.0
  B  B6  1  0.750  0.119  0.238  1.0
  B  B7  1  0.250  0.881  0.762  1.0
  B  B8  1  0.750  0.827  0.654  1.0
  B  B9  1  0.250  0.173  0.346  1.0
[/CIF]
.
The compound described by Cr2B3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent B(3), four equivalent B(2), and six equivalent B(1) atoms to form a mixture of edge and face-sharing CrB12 cuboctahedra. In the second Cr site, Cr(2) is bonded in a 7-coordinate geometry to two equivalent B(2) and five equivalent B(3) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to six equivalent Cr(1), one B(2), and two equivalent B(1) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Cr(2), four equivalent Cr(1), one B(1), and two equivalent B(3) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to two equivalent Cr(1), five equivalent Cr(2), and two equivalent B(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2B3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.931
_cell_length_b   2.912
_cell_length_c   9.166
_cell_angle_alpha   99.139
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   77.231
_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  0.750  0.428  0.857  1.0
  Cr  Cr1  1  0.250  0.572  0.143  1.0
  Cr  Cr2  1  0.750  0.702  0.405  1.0
  Cr  Cr3  1  0.250  0.298  0.595  1.0
  B  B4  1  0.750  0.024  0.047  1.0
  B  B5  1  0.250  0.976  0.953  1.0
  B  B6  1  0.750  0.119  0.238  1.0
  B  B7  1  0.250  0.881  0.762  1.0
  B  B8  1  0.750  0.827  0.654  1.0
  B  B9  1  0.250  0.173  0.346  1.0
[/CIF]
.