data_[Na8Pb4O8]
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 [Cmc2_1]
_cell_length_a [3.4734]
_cell_length_b [17.4952]
_cell_length_c [6.0577]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Na2PbO2]
_chemical_formula_sum '[Na8 Pb4 O8]'
_cell_volume [368.1066]
_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  0.0000  0.1098  0.1586  1.0
  Na  Na1  4  0.0000  0.2462  0.8271  1.0
  Pb  Pb2  4  0.0000  0.4107  0.1717  1.0
  O  O3  4  0.0000  0.1539  0.5133  1.0
  O  O4  4  0.0000  0.3407  0.4636  1.0
]