data_[Na4Bi2Pb2O8]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [11.4003]
_cell_length_b [4.7596]
_cell_length_c [4.9277]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.9933]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [Na2BiPbO4]
_chemical_formula_sum '[Na4 Bi2 Pb2 O8]'
_cell_volume [242.3420]
_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
[
  Na  Na0  2  0.0045  0.0000  0.0020  1.0
  Na  Na1  2  0.2572  0.0000  0.7517  1.0
  Bi  Bi2  2  0.0040  0.5000  0.4960  1.0
  Pb  Pb3  2  0.2502  0.5000  0.2459  1.0
  O  O4  2  0.0141  0.5000  0.0599  1.0
  O  O5  2  0.2301  0.5000  0.7188  1.0
  O  O6  2  0.2573  0.0000  0.2457  1.0
  O  O7  2  0.4826  0.5000  0.4801  1.0
]