data_[Na8Pb8O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I2_13]
_cell_length_a [7.8362]
_cell_length_b [7.8362]
_cell_length_c [7.8362]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [199]
_chemical_formula_structural [Na2Pb2O3]
_chemical_formula_sum '[Na8 Pb8 O12]'
_cell_volume [481.1880]
_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  8  0.0409  0.0409  0.0409  1
  Pb  Pb1  8  0.2206  0.2794  0.7206  1
  O  O2  12  0.0000  0.2500  0.3206  1
]