data_BC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.27
_cell_length_b   2.84
_cell_length_c   4.97
_cell_angle_alpha   90.0
_cell_angle_beta   90.59
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BC
_chemical_formula_sum   'B2 C2'
_cell_volume   46.21
_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
  B  B0  1  0.21  0.13  0.15  1.0
  B  B1  1  0.01  0.71  0.82  1.0
  C  C2  1  0.02  0.13  0.06  1.0
  C  C3  1  0.2  0.71  0.91  1.0

data_BC
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.84
_cell_length_b   3.27
_cell_length_c   4.97
_cell_angle_alpha   90.59
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   BC
_chemical_formula_sum   'B2 C2'
_cell_volume   46.21
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.21  0.6  0.17  1.0
  C  C1  2  0.21  0.41  0.07  1.0

B B C C