data_[Rb4Cd4Pb2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cd  1.6900  1.5500  1.0900
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.8147]
_cell_length_b [4.4517]
_cell_length_c [8.3141]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.3422]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Cd2PbSe4]
_chemical_formula_sum '[Rb4 Cd4 Pb2 Se8]'
_cell_volume [587.2103]
_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
[
  Rb  Rb0  4  0.1244  0.0000  0.5426  1.0
  Cd  Cd1  4  0.1695  0.5000  0.9798  1.0
  Pb  Pb2  2  0.0000  0.0000  0.0000  1.0
  Se  Se3  4  0.0192  0.5000  0.7513  1.0
  Se  Se4  4  0.2068  0.0000  0.1832  1.0
]