data_[K4Ta4Pb2O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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 [I4/mmm]
_cell_length_a [4.0246]
_cell_length_b [4.0246]
_cell_length_c [22.1577]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [K2Ta2PbO7]
_chemical_formula_sum '[K4 Ta4 Pb2 O14]'
_cell_volume [358.8987]
_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
[
  K  K0  4  0.0000  0.0000  0.1933  1.0
  Ta  Ta1  4  0.0000  0.0000  0.4026  1.0
  Pb  Pb2  2  0.0000  0.0000  0.0000  1.0
  O  O3  8  0.0000  0.5000  0.0899  1.0
  O  O4  4  0.0000  0.0000  0.3183  1.0
  O  O5  2  0.0000  0.0000  0.5000  1.0
]