data_[K4Hg16Br4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Hg  2.0000  1.5000  1.2450
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [F-43m]
_cell_length_a [9.2291]
_cell_length_b [9.2291]
_cell_length_c [9.2291]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [216]
_chemical_formula_structural [KHg4Br]
_chemical_formula_sum '[K4 Hg16 Br4]'
_cell_volume [786.0983]
_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  0.2500  0.2500  0.2500  1
  Hg  Hg1  16  0.1259  0.1259  0.6259  1
  Br  Br2  4  0.0000  0.0000  0.0000  1
]