data_[K4Hg2Bi2O8]
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
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [8.0002]
_cell_length_b [7.9789]
_cell_length_c [6.1715]
_cell_angle_alpha [90.0000]
_cell_angle_beta [128.4183]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [K2HgBiO4]
_chemical_formula_sum '[K4 Hg2 Bi2 O8]'
_cell_volume [308.6548]
_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  2  0.0000  0.7223  0.0000  1.0
  K  K1  2  0.0000  0.9656  0.5000  1.0
  Hg  Hg2  2  0.0000  0.4742  0.5000  1.0
  Bi  Bi3  2  0.0000  0.2475  0.0000  1.0
  O  O4  4  0.1743  0.4224  0.9429  1.0
  O  O5  4  0.2411  0.1792  0.4298  1.0
]