data_[K8Rb6Hg8]
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
]
_symmetry_space_group_name_H-M [I-43m]
_cell_length_a [10.5691]
_cell_length_b [10.5691]
_cell_length_c [10.5691]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [217]
_chemical_formula_structural [K4Rb3Hg4]
_chemical_formula_sum '[K8 Rb6 Hg8]'
_cell_volume [1180.6186]
_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  0.2021  0.2021  0.7979  1.0
  Rb  Rb1  6  0.0000  0.0000  0.5000  1.0
  Hg  Hg2  8  0.1124  0.8876  0.8876  1.0
]