data_[K6V6Hg3O21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  V  1.6300  1.3500  0.7775
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R32]
_cell_length_a [6.0648]
_cell_length_b [6.0648]
_cell_length_c [22.8974]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [155]
_chemical_formula_structural [K2V2HgO7]
_chemical_formula_sum '[K6 V6 Hg3 O21]'
_cell_volume [729.3739]
_cell_formula_units_Z [3]
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  6  0.0000  0.0000  0.2298  1.0
  V  V1  6  0.0000  0.0000  0.0793  1.0
  Hg  Hg2  3  0.0000  0.0000  0.5000  1.0
  O  O3  18  0.0283  0.4864  0.7720  1.0
  O  O4  3  0.0000  0.0000  0.0000  1.0
]