The material structure described by BC7 crystallizes in the cubic P-43m space group. B(1) is bonded to four equivalent C(2) atoms to form BC4 tetrahedra that share corners with twelve equivalent C(1)C4 tetrahedra. There are two inequivalent C sites. In the first C site, C(1) is bonded to four equivalent C(2) atoms to form CC4 tetrahedra that share corners with four equivalent B(1)C4 tetrahedra and corners with eight equivalent C(1)C4 tetrahedra. In the second C site, C(2) is bonded to one B(1) and three equivalent C(1) atoms to form distorted corner-sharing CBC3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BC7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.620
_cell_length_b   3.620
_cell_length_c   3.620
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   47.444
_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
  B  B0  1  0.000  0.000  0.000  1.0
  C  C1  1  0.000  0.500  0.500  1.0
  C  C2  1  0.500  0.500  0.000  1.0
  C  C3  1  0.500  0.000  0.500  1.0
  C  C4  1  0.745  0.745  0.255  1.0
  C  C5  1  0.745  0.255  0.745  1.0
  C  C6  1  0.255  0.745  0.745  1.0
  C  C7  1  0.255  0.255  0.255  1.0
[/CIF]
.
The material structure described by BC7 crystallizes in the cubic P-43m space group. B(1) is bonded to four equivalent C(2) atoms to form BC4 tetrahedra that share corners with twelve equivalent C(1)C4 tetrahedra. There are two inequivalent C sites. In the first C site, C(1) is bonded to four equivalent C(2) atoms to form CC4 tetrahedra that share corners with four equivalent B(1)C4 tetrahedra and corners with eight equivalent C(1)C4 tetrahedra. In the second C site, C(2) is bonded to one B(1) and three equivalent C(1) atoms to form distorted corner-sharing CBC3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BC7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.620
_cell_length_b   3.620
_cell_length_c   3.620
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   47.444
_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
  B  B0  1  0.000  0.000  0.000  1.0
  C  C1  1  0.000  0.500  0.500  1.0
  C  C2  1  0.500  0.500  0.000  1.0
  C  C3  1  0.500  0.000  0.500  1.0
  C  C4  1  0.745  0.745  0.255  1.0
  C  C5  1  0.745  0.255  0.745  1.0
  C  C6  1  0.255  0.745  0.745  1.0
  C  C7  1  0.255  0.255  0.255  1.0
[/CIF]
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