data_P2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.13
_cell_length_b   6.83
_cell_length_c   2.54
_cell_angle_alpha   86.33
_cell_angle_beta   72.83
_cell_angle_gamma   20.85
_symmetry_Int_Tables_number   1
_chemical_formula_structural   P2Se
_chemical_formula_sum   'P2 Se1'
_cell_volume   32.95
_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
  P  P0  1  0.05  0.31  0.4  1.0
  P  P1  1  0.05  0.31  0.1  1.0
  Se  Se2  1  0.0  0.0  0.0  1.0

data_P2Se
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.11
_cell_length_b   2.54
_cell_length_c   6.83
_cell_angle_alpha   86.33
_cell_angle_beta   81.11
_cell_angle_gamma   65.5
_symmetry_Int_Tables_number   1
_chemical_formula_structural   P2Se
_chemical_formula_sum   'P2 Se1'
_cell_volume   32.95
_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
  P  P0  1  0.95  0.15  0.37  1.0
  P  P1  1  0.95  0.45  0.37  1.0
  Se  Se2  1  0.0  0.0  0.0  1.0

P P Se