data_[Rb12Hg8Pb20]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [14.5631]
_cell_length_b [15.3407]
_cell_length_c [7.4200]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.6952]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb3Hg2Pb5]
_chemical_formula_sum '[Rb12 Hg8 Pb20]'
_cell_volume [1617.1691]
_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  8  0.1216  0.2853  0.0739  1.0
  Rb  Rb1  4  0.0000  0.0206  0.7500  1.0
  Hg  Hg2  8  0.1323  0.1676  0.5123  1.0
  Pb  Pb3  8  0.1391  0.3729  0.5722  1.0
  Pb  Pb4  8  0.2395  0.0136  0.0937  1.0
  Pb  Pb5  4  0.0000  0.4978  0.2500  1.0
]