data_Si2BW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.78
_cell_length_b   4.78
_cell_length_c   4.78
_cell_angle_alpha   138.14
_cell_angle_beta   138.14
_cell_angle_gamma   60.69
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2BW
_chemical_formula_sum   'Si2 B1 W1'
_cell_volume   48.18
_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
  Si  Si1  1  0.71  0.0  0.06  1.0
  Si  Si2  1  0.0  0.71  0.06  1.0
  B  B0  1  0.0  0.0  0.0  1.0
  W  W3  1  0.0  0.0  0.13  1.0

data_Si2BW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.83
_cell_length_b   4.83
_cell_length_c   4.78
_cell_angle_alpha   90.0
_cell_angle_beta   120.34
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Si2BW
_chemical_formula_sum   'Si4 B2 W2'
_cell_volume   96.36
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Si  Si0  4  0.29  0.35  0.64  1.0
  B  B1  2  0.0  0.0  0.0  1.0
  W  W2  2  0.37  0.5  0.87  1.0

Si Si B W