data_WSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.53
_cell_length_b   6.53
_cell_length_c   6.53
_cell_angle_alpha   153.0
_cell_angle_beta   66.97
_cell_angle_gamma   120.01
_symmetry_Int_Tables_number   1
_chemical_formula_structural   WSe3
_chemical_formula_sum   'W1 Se3'
_cell_volume   108.48
_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
  W  W3  1  0.52  0.0  0.91  1.0
  Se  Se0  1  0.0  0.73  0.9  1.0
  Se  Se1  1  0.52  0.72  0.64  1.0
  Se  Se2  1  0.0  0.0  0.44  1.0

data_WSe3
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.05
_cell_length_b   6.53
_cell_length_c   6.53
_cell_angle_alpha   59.99
_cell_angle_beta   76.5
_cell_angle_gamma   76.5
_symmetry_Int_Tables_number   1
_chemical_formula_structural   WSe3
_chemical_formula_sum   'W1 Se3'
_cell_volume   108.48
_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
  W  W0  1  0.09  0.52  0.91  1.0
  Se  Se1  1  0.1  0.0  0.17  1.0
  Se  Se2  1  0.36  0.52  0.92  1.0
  Se  Se3  1  0.56  0.0  0.44  1.0

W Se Se Se