data_[Na4Pb4O6]
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 [C2/m]
_cell_length_a [11.4291]
_cell_length_b [3.3836]
_cell_length_c [6.9921]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.5604]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Pb2O3]
_chemical_formula_sum '[Na4 Pb4 O6]'
_cell_volume [267.3845]
_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  4  0.1346  0.5000  0.8939  1.0
  Pb  Pb1  4  0.1175  0.0000  0.2970  1.0
  O  O2  4  0.2302  0.5000  0.2180  1.0
  O  O3  2  0.0000  0.0000  0.0000  1.0
]