data_[Rb4Hg12Pb6]
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 [Cmmm]
_cell_length_a [12.3002]
_cell_length_b [13.8140]
_cell_length_c [4.6553]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Rb2(Hg2Pb)3]
_chemical_formula_sum '[Rb4 Hg12 Pb6]'
_cell_volume [790.9961]
_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  4  0.0000  0.2894  0.0000  1
  Hg  Hg1  8  0.1970  0.1578  0.5000  1
  Hg  Hg2  4  0.1174  0.5000  0.5000  1
  Pb  Pb3  4  0.1947  0.0000  0.0000  1
  Pb  Pb4  2  0.0000  0.0000  0.5000  1
]