data_[K12Rb4Hg2]
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 [C2/m]
_cell_length_a [19.8323]
_cell_length_b [13.2452]
_cell_length_c [4.8667]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.7164]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K6Rb2Hg]
_chemical_formula_sum '[K12 Rb4 Hg2]'
_cell_volume [1241.9429]
_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  0.1771  0.1521  0.1827  1.0
  K  K1  4  0.0000  0.2083  0.5000  1.0
  Rb  Rb2  4  0.1226  0.5000  0.0972  1.0
  Hg  Hg3  2  0.0000  0.0000  0.0000  1.0
]