data_[Pb2Br1Cl1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pb  2.3300  1.8000  1.1225
  Br  2.9600  1.1500  0.8825
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [Pmmm]
_cell_length_a [3.7718]
_cell_length_b [4.9251]
_cell_length_c [6.3236]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [47]
_chemical_formula_structural [Pb2BrCl]
_chemical_formula_sum '[Pb2 Br1 Cl1]'
_cell_volume [117.4701]
_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
[
  Pb  Pb0  1  0.0000  0.0000  0.0000  1
  Pb  Pb1  1  0.5000  0.0000  0.5000  1
  Br  Br2  1  0.5000  0.5000  0.0000  1
  Cl  Cl3  1  0.0000  0.5000  0.5000  1
]