data_[Na8Bi8Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Bi  2.0200  1.6000  1.0350
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.0246]
_cell_length_b [5.3006]
_cell_length_c [10.8836]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.8844]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Bi2Pb]
_chemical_formula_sum '[Na8 Bi8 Pb4]'
_cell_volume [676.0014]
_cell_formula_units_Z [4]
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
[
  Na  Na0  4  0.0045  0.5000  0.6847  1.0
  Na  Na1  4  0.1659  0.5000  0.0772  1.0
  Bi  Bi2  4  0.0494  0.0000  0.8913  1.0
  Bi  Bi3  4  0.1349  0.0000  0.5930  1.0
  Pb  Pb4  4  0.2017  0.0000  0.3443  1.0
]