data_W2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.7
_cell_length_b   5.7
_cell_length_c   5.96
_cell_angle_alpha   102.13
_cell_angle_beta   102.13
_cell_angle_gamma   31.43
_symmetry_Int_Tables_number   1
_chemical_formula_structural   W2Se
_chemical_formula_sum   'W4 Se2'
_cell_volume   98.37
_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
  W  W2  1  0.99  0.0  0.8  1.0
  W  W3  1  0.6  0.0  0.55  1.0
  W  W4  1  0.92  0.0  0.4  1.0
  W  W5  1  0.22  0.0  0.19  1.0
  Se  Se0  1  0.97  0.0  0.14  1.0
  Se  Se1  1  0.56  0.0  0.5  1.0

data_W2Se
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.09
_cell_length_b   5.7
_cell_length_c   5.96
_cell_angle_alpha   102.13
_cell_angle_beta   90.0
_cell_angle_gamma   105.72
_symmetry_Int_Tables_number   1
_chemical_formula_structural   W2Se
_chemical_formula_sum   'W4 Se2'
_cell_volume   98.37
_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
  W  W0  1  0.0  0.01  0.2  1.0
  W  W1  1  0.0  0.08  0.6  1.0
  W  W2  1  0.0  0.4  0.45  1.0
  W  W3  1  0.0  0.78  0.81  1.0
  Se  Se4  1  0.0  0.03  0.86  1.0
  Se  Se5  1  0.0  0.44  0.5  1.0

W W W W Se Se