data_[Cr2Cu2Pb2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cr  1.6600  1.4000  0.9400
  Cu  1.9000  1.3500  0.8200
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.8538]
_cell_length_b [3.8745]
_cell_length_c [8.9622]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.1510]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [CrCuPbSe3]
_chemical_formula_sum '[Cr2 Cu2 Pb2 Se6]'
_cell_volume [261.9488]
_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
[
  Cr  Cr0  2  0.3317  0.7500  0.8469  1.0
  Cu  Cu1  2  0.0755  0.2500  0.5895  1.0
  Pb  Pb2  2  0.1957  0.2500  0.2674  1.0
  Se  Se3  2  0.1199  0.2500  0.8716  1.0
  Se  Se4  2  0.2575  0.7500  0.5451  1.0
  Se  Se5  2  0.4488  0.7500  0.1388  1.0
]