data_[Rb8Bi4Pb4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [Cmc2_1]
_cell_length_a [3.6469]
_cell_length_b [14.0524]
_cell_length_c [14.1490]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2BiPbO5]
_chemical_formula_sum '[Rb8 Bi4 Pb4 O20]'
_cell_volume [725.1100]
_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  0.0756  0.6741  1.0
  Rb  Rb1  4  0.0000  0.1680  0.2883  1.0
  Bi  Bi2  4  0.0000  0.4745  0.4447  1.0
  Pb  Pb3  4  0.0000  0.2295  0.0296  1.0
  O  O4  4  0.0000  0.0611  0.0243  1.0
  O  O5  4  0.0000  0.2711  0.6269  1.0
  O  O6  4  0.0000  0.3132  0.4287  1.0
  O  O7  4  0.0000  0.3818  0.0034  1.0
  O  O8  4  0.0000  0.4916  0.8040  1.0
]