data_[Rb4Bi2Pb2O8]
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 [I-4]
_cell_length_a [6.3099]
_cell_length_b [6.3099]
_cell_length_c [9.9410]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [Rb2BiPbO4]
_chemical_formula_sum '[Rb4 Bi2 Pb2 O8]'
_cell_volume [395.7946]
_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
[
  Rb  Rb0  2  0.0000  0.0000  0.5000  1
  Rb  Rb1  2  0.0000  0.5000  0.2500  1
  Bi  Bi2  2  0.0000  0.5000  0.7500  1
  Pb  Pb3  2  0.0000  0.0000  0.0000  1
  O  O4  8  0.1600  0.7419  0.8724  1
]