data_[Na3Bi6Pb3O18]
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 [R3]
_cell_length_a [5.8829]
_cell_length_b [5.8829]
_cell_length_c [15.8077]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaBi2PbO6]
_chemical_formula_sum '[Na3 Bi6 Pb3 O18]'
_cell_volume [473.7902]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.8007  1.0
  Bi  Bi1  3  0.0000  0.0000  0.0174  1.0
  Bi  Bi2  3  0.0000  0.0000  0.5210  1.0
  Pb  Pb3  3  0.0000  0.0000  0.3143  1.0
  O  O4  9  0.0179  0.3131  0.9218  1.0
  O  O5  9  0.0662  0.6933  0.0809  1.0
]