data_[K8Rb4Hg4]
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 [P2_1/c]
_cell_length_a [11.6399]
_cell_length_b [8.6339]
_cell_length_c [10.8003]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.4013]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [K2RbHg]
_chemical_formula_sum '[K8 Rb4 Hg4]'
_cell_volume [963.6285]
_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
[
  K  K0  4  0.1413  0.2460  0.0681  1.0
  K  K1  4  0.1997  0.6950  0.8514  1.0
  Rb  Rb2  4  0.4959  0.5016  0.3050  1.0
  Hg  Hg3  4  0.4113  0.1431  0.4552  1.0
]