data_[K8Na4Ag4Hg8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [6.9149]
_cell_length_b [16.7889]
_cell_length_c [6.9216]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [K2NaAgHg2]
_chemical_formula_sum '[K8 Na4 Ag4 Hg8]'
_cell_volume [803.5537]
_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  8  0.2454  0.1719  0.0000  1
  Na  Na1  4  0.0000  0.0000  0.2500  1
  Ag  Ag2  4  0.0000  0.5000  0.2500  1
  Hg  Hg3  8  0.2259  0.3910  0.0000  1
]