data_[Na6Pu3Pb3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pu  1.2800  1.7500  0.9675
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.8302]
_cell_length_b [5.8302]
_cell_length_c [14.8328]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Na2PuPbO6]
_chemical_formula_sum '[Na6 Pu3 Pb3 O18]'
_cell_volume [436.6385]
_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  0.0417  1
  Na  Na1  3  0.0000  0.0000  0.5462  1
  Pu  Pu2  3  0.0000  0.0000  0.3195  1
  Pb  Pb3  3  0.0000  0.0000  0.8161  1
  O  O4  9  0.0312  0.6164  0.0678  1
  O  O5  9  0.0768  0.3499  0.9116  1
]