The crystal structure described by Cr3B7O13Br crystallizes in the cubic F-43c space group. Cr(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) and two equivalent Br(1) atoms. There are two inequivalent B sites. In the first B site, B(2) is bonded to four equivalent O(1) atoms to form corner-sharing BO4 tetrahedra. In the second B site, B(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing BO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(2) is bonded in a tetrahedral geometry to four equivalent B(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Cr(1), one B(1), and one B(2) atom. Br(1) is bonded to six equivalent Cr(1) atoms to form corner-sharing BrCr6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Cr3B7BrO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.694
_cell_length_b   8.694
_cell_length_c   8.694
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   464.597
_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  0.500  0.500  0.000  1.0
  Cr  Cr1  1  0.500  0.000  0.000  1.0
  Cr  Cr2  1  0.000  0.000  0.500  1.0
  Cr  Cr3  1  0.000  0.500  0.000  1.0
  Cr  Cr4  1  0.500  0.000  0.500  1.0
  Cr  Cr5  1  0.000  0.500  0.500  1.0
  B  B6  1  0.920  0.920  0.920  1.0
  B  B7  1  0.420  0.740  0.420  1.0
  B  B8  1  0.920  0.920  0.240  1.0
  B  B9  1  0.240  0.920  0.920  1.0
  B  B10  1  0.420  0.420  0.420  1.0
  B  B11  1  0.740  0.420  0.420  1.0
  B  B12  1  0.420  0.420  0.740  1.0
  B  B13  1  0.920  0.240  0.920  1.0
  B  B14  1  0.250  0.250  0.750  1.0
  B  B15  1  0.250  0.750  0.750  1.0
  B  B16  1  0.750  0.250  0.250  1.0
  B  B17  1  0.250  0.750  0.250  1.0
  B  B18  1  0.750  0.250  0.750  1.0
  B  B19  1  0.750  0.750  0.250  1.0
  Br  Br20  1  0.750  0.750  0.750  1.0
  Br  Br21  1  0.250  0.250  0.250  1.0
  O  O22  1  0.296  0.745  0.895  1.0
  O  O23  1  0.895  0.064  0.296  1.0
  O  O24  1  0.796  0.245  0.564  1.0
  O  O25  1  0.245  0.395  0.564  1.0
  O  O26  1  0.245  0.564  0.796  1.0
  O  O27  1  0.245  0.796  0.395  1.0
  O  O28  1  0.395  0.796  0.564  1.0
  O  O29  1  0.564  0.796  0.245  1.0
  O  O30  1  0.000  0.000  0.000  1.0
  O  O31  1  0.500  0.500  0.500  1.0
  O  O32  1  0.745  0.296  0.064  1.0
  O  O33  1  0.395  0.245  0.796  1.0
  O  O34  1  0.796  0.564  0.395  1.0
  O  O35  1  0.395  0.564  0.245  1.0
  O  O36  1  0.564  0.395  0.796  1.0
  O  O37  1  0.564  0.245  0.395  1.0
  O  O38  1  0.796  0.395  0.245  1.0
  O  O39  1  0.064  0.296  0.895  1.0
  O  O40  1  0.895  0.296  0.745  1.0
  O  O41  1  0.296  0.895  0.064  1.0
  O  O42  1  0.895  0.745  0.064  1.0
  O  O43  1  0.296  0.064  0.745  1.0
  O  O44  1  0.064  0.745  0.296  1.0
  O  O45  1  0.745  0.895  0.296  1.0
  O  O46  1  0.745  0.064  0.895  1.0
  O  O47  1  0.064  0.895  0.745  1.0
[/CIF]
.
The crystal structure described by Cr3B7O13Br crystallizes in the cubic F-43c space group. Cr(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) and two equivalent Br(1) atoms. There are two inequivalent B sites. In the first B site, B(2) is bonded to four equivalent O(1) atoms to form corner-sharing BO4 tetrahedra. In the second B site, B(1) is bonded to one O(2) and three equivalent O(1) atoms to form corner-sharing BO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(2) is bonded in a tetrahedral geometry to four equivalent B(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Cr(1), one B(1), and one B(2) atom. Br(1) is bonded to six equivalent Cr(1) atoms to form corner-sharing BrCr6 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Cr3B7BrO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.694
_cell_length_b   8.694
_cell_length_c   8.694
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   464.597
_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  0.500  0.500  0.000  1.0
  Cr  Cr1  1  0.500  0.000  0.000  1.0
  Cr  Cr2  1  0.000  0.000  0.500  1.0
  Cr  Cr3  1  0.000  0.500  0.000  1.0
  Cr  Cr4  1  0.500  0.000  0.500  1.0
  Cr  Cr5  1  0.000  0.500  0.500  1.0
  B  B6  1  0.920  0.920  0.920  1.0
  B  B7  1  0.420  0.740  0.420  1.0
  B  B8  1  0.920  0.920  0.240  1.0
  B  B9  1  0.240  0.920  0.920  1.0
  B  B10  1  0.420  0.420  0.420  1.0
  B  B11  1  0.740  0.420  0.420  1.0
  B  B12  1  0.420  0.420  0.740  1.0
  B  B13  1  0.920  0.240  0.920  1.0
  B  B14  1  0.250  0.250  0.750  1.0
  B  B15  1  0.250  0.750  0.750  1.0
  B  B16  1  0.750  0.250  0.250  1.0
  B  B17  1  0.250  0.750  0.250  1.0
  B  B18  1  0.750  0.250  0.750  1.0
  B  B19  1  0.750  0.750  0.250  1.0
  Br  Br20  1  0.750  0.750  0.750  1.0
  Br  Br21  1  0.250  0.250  0.250  1.0
  O  O22  1  0.296  0.745  0.895  1.0
  O  O23  1  0.895  0.064  0.296  1.0
  O  O24  1  0.796  0.245  0.564  1.0
  O  O25  1  0.245  0.395  0.564  1.0
  O  O26  1  0.245  0.564  0.796  1.0
  O  O27  1  0.245  0.796  0.395  1.0
  O  O28  1  0.395  0.796  0.564  1.0
  O  O29  1  0.564  0.796  0.245  1.0
  O  O30  1  0.000  0.000  0.000  1.0
  O  O31  1  0.500  0.500  0.500  1.0
  O  O32  1  0.745  0.296  0.064  1.0
  O  O33  1  0.395  0.245  0.796  1.0
  O  O34  1  0.796  0.564  0.395  1.0
  O  O35  1  0.395  0.564  0.245  1.0
  O  O36  1  0.564  0.395  0.796  1.0
  O  O37  1  0.564  0.245  0.395  1.0
  O  O38  1  0.796  0.395  0.245  1.0
  O  O39  1  0.064  0.296  0.895  1.0
  O  O40  1  0.895  0.296  0.745  1.0
  O  O41  1  0.296  0.895  0.064  1.0
  O  O42  1  0.895  0.745  0.064  1.0
  O  O43  1  0.296  0.064  0.745  1.0
  O  O44  1  0.064  0.745  0.296  1.0
  O  O45  1  0.745  0.895  0.296  1.0
  O  O46  1  0.745  0.064  0.895  1.0
  O  O47  1  0.064  0.895  0.745  1.0
[/CIF]
.