data_[Rb4Hg2Pb2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Hg  2.0000  1.5000  1.2450
  Pb  2.3300  1.8000  1.1225
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [8.5602]
_cell_length_b [8.1971]
_cell_length_c [6.3039]
_cell_angle_alpha [90.0000]
_cell_angle_beta [130.5670]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [Rb2HgPbO4]
_chemical_formula_sum '[Rb4 Hg2 Pb2 O8]'
_cell_volume [336.0171]
_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  0.5589  0.0000  1.0
  Rb  Rb1  2  0.0000  0.7953  0.5000  1.0
  Hg  Hg2  2  0.0000  0.0700  0.0000  1.0
  Pb  Pb3  2  0.0000  0.2692  0.5000  1.0
  O  O4  4  0.1583  0.0995  0.4279  1.0
  O  O5  4  0.2261  0.3604  0.8945  1.0
]