data_[K8Rb2Hg4]
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/m]
_cell_length_a [9.7732]
_cell_length_b [7.8046]
_cell_length_c [10.2191]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.6399]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [K4RbHg2]
_chemical_formula_sum '[K8 Rb2 Hg4]'
_cell_volume [724.5378]
_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  4  0.2365  0.5025  0.5771  1
  Rb  Rb1  2  0.0043  0.2500  0.1470  1
  K  K2  2  0.3450  0.7500  0.2583  1
  K  K3  2  0.3869  0.2500  0.0173  1
  Hg  Hg4  2  0.0206  0.2500  0.7424  1
  Hg  Hg5  2  0.4200  0.2500  0.3771  1
]