data_[As2Se4Br2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [3.7387]
_cell_length_b [4.7462]
_cell_length_c [13.3672]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [AsSe2Br]
_chemical_formula_sum '[As2 Se4 Br2]'
_cell_volume [237.1952]
_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  0.0000  0.5128  1
  Se  Se1  2  0.0000  0.0000  0.9506  1
  Se  Se2  2  0.0000  0.5000  0.8728  1
  Br  Br3  2  0.0000  0.5000  0.1638  1
]