data_[Na4Ta2Pb2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ta  1.5000  1.4500  0.8200
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.6667]
_cell_length_b [5.7835]
_cell_length_c [9.8520]
_cell_angle_alpha [90.0000]
_cell_angle_beta [125.0984]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2TaPbO6]
_chemical_formula_sum '[Na4 Ta2 Pb2 O12]'
_cell_volume [264.1738]
_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  0.2407  0.5351  0.7503  1
  Ta  Ta1  2  0.0000  0.0000  0.5000  1
  Pb  Pb2  2  0.5000  0.0000  0.0000  1
  O  O3  4  0.1415  0.7201  0.4486  1
  O  O4  4  0.2349  0.1959  0.4535  1
  O  O5  4  0.3320  0.5269  0.2375  1
]