data_BiW4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   5.01
_cell_angle_alpha   101.3
_cell_angle_beta   101.3
_cell_angle_gamma   127.44
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BiW4
_chemical_formula_sum   'Bi1 W4'
_cell_volume   89.38
_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
  Bi  Bi0  1  0.0  0.0  0.0  1.0
  W  W1  1  0.68  0.22  0.0  1.0
  W  W2  1  0.22  0.67  0.0  1.0
  W  W3  1  0.49  0.95  0.22  1.0
  W  W4  1  0.95  0.51  0.22  1.0

data_BiW4
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.43
_cell_length_b   8.98
_cell_length_c   5.01
_cell_angle_alpha   90.0
_cell_angle_beta   116.28
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BiW4
_chemical_formula_sum   'Bi2 W8'
_cell_volume   178.77
_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
  Bi  Bi0  2  0.0  0.0  0.0  1.0
  W  W1  4  0.05  0.27  0.0  1.0
  W  W2  4  0.5  0.23  0.22  1.0

Bi W W W W