data_[As2P4Se2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  As  2.1800  1.1500  0.6600
  P  2.1900  1.0000  0.5500
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmm2]
_cell_length_a [3.3508]
_cell_length_b [7.5739]
_cell_length_c [8.8208]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [35]
_chemical_formula_structural [AsP2Se]
_chemical_formula_sum '[As2 P4 Se2]'
_cell_volume [223.8597]
_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  2  0.0000  0.5000  0.2581  1
  P  P1  2  0.0000  0.0000  0.9726  1
  P  P2  2  0.0000  0.5000  0.8198  1
  Se  Se3  2  0.0000  0.0000  0.4496  1
]