data_AsSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.09
_cell_length_b   15.09
_cell_length_c   15.09
_cell_angle_alpha   165.93
_cell_angle_beta   165.93
_cell_angle_gamma   19.94
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AsSe3
_chemical_formula_sum   'As2 Se6'
_cell_volume   203.04
_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
  As  As0  1  0.0  0.0  0.59  1.0
  As  As1  1  0.0  0.0  0.14  1.0
  Se  Se2  1  0.0  0.85  0.0  1.0
  Se  Se3  1  0.85  0.0  0.0  1.0
  Se  Se4  1  0.85  0.0  0.43  1.0
  Se  Se5  1  0.0  0.85  0.43  1.0
  Se  Se6  1  0.0  0.0  0.91  1.0
  Se  Se7  1  0.0  0.0  0.82  1.0

data_AsSe3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.23
_cell_length_b   5.23
_cell_length_c   15.09
_cell_angle_alpha   90.0
_cell_angle_beta   99.97
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   AsSe3
_chemical_formula_sum   'As4 Se12'
_cell_volume   406.08
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  As  As0  2  0.0  0.0  0.41  1.0
  As  As1  2  0.0  0.0  0.86  1.0
  Se  Se2  4  0.42  0.42  0.85  1.0
  Se  Se3  4  0.42  0.42  0.42  1.0
  Se  Se4  2  0.0  0.0  0.09  1.0
  Se  Se5  2  0.0  0.0  0.18  1.0

As As Se Se Se Se Se Se