data_SiWSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.24
_cell_length_b   3.24
_cell_length_c   5.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiWSe
_chemical_formula_sum   'Si1 W1 Se1'
_cell_volume   51.22
_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  0.0  0.0  0.03  1.0
  W  W2  1  0.62  0.94  0.74  1.0
  Se  Se0  1  1.0  0.87  0.5  1.0

data_SiWSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.24
_cell_length_b   3.24
_cell_length_c   5.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiWSe
_chemical_formula_sum   'Si1 W1 Se1'
_cell_volume   51.22
_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  Si0  1  0.0  0.0  0.03  1.0
  W  W1  1  0.62  0.94  0.74  1.0
  Se  Se2  1  1.0  0.87  0.5  1.0

Si W Se
Si W Se 0 1 - - - 1 2 o o o 