data_[Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P1]
_cell_length_a [5.1130]
_cell_length_b [5.6517]
_cell_length_c [5.7185]
_cell_angle_alpha [78.8315]
_cell_angle_beta [69.8501]
_cell_angle_gamma [89.4313]
_symmetry_Int_Tables_number [1]
_chemical_formula_structural [Se]
_chemical_formula_sum '[Se4]'
_cell_volume [151.9080]
_cell_formula_units_Z [4]
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
[
  Se  Se0  1  0.0061  0.9510  0.6208  1.0
  Se  Se1  1  0.0828  0.1103  0.9407  1.0
  Se  Se2  1  0.3754  0.7015  0.4417  1.0
  Se  Se3  1  0.4557  0.4205  0.7618  1.0
]