data_[Rb4Nb8Pb4O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nb  1.6000  1.4500  0.8200
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [12.0881]
_cell_length_b [11.5947]
_cell_length_c [6.2339]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.0589]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbNb2PbO6]
_chemical_formula_sum '[Rb4 Nb8 Pb4 O24]'
_cell_volume [847.5600]
_cell_formula_units_Z [4]
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
[
  Rb  Rb0  4  0.0000  0.1009  0.7500  1
  Nb  Nb1  8  0.2321  0.3994  0.7272  1
  Pb  Pb2  4  0.0000  0.3007  0.2500  1
  O  O3  8  0.1163  0.1525  0.1923  1
  O  O4  8  0.1217  0.2879  0.6375  1
  O  O5  8  0.2131  0.4941  0.9782  1
]