data_[K8Rb4Hg2Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  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/m]
_cell_length_a [15.1426]
_cell_length_b [8.8534]
_cell_length_c [6.5701]
_cell_angle_alpha [90.0000]
_cell_angle_beta [101.0520]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K4Rb2HgPb2]
_chemical_formula_sum '[K8 Rb4 Hg2 Pb4]'
_cell_volume [864.4750]
_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
[
  K  K0  8  0.1271  0.2196  0.2107  1
  Rb  Rb1  4  0.1432  0.5000  0.7183  1
  Hg  Hg2  2  0.0000  0.0000  0.5000  1
  Pb  Pb3  4  0.1811  0.0000  0.7443  1
]