data_[Rb6V6Hg3O21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [R-3m]
_cell_length_a [6.1603]
_cell_length_b [6.1603]
_cell_length_c [22.6275]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Rb2V2HgO7]
_chemical_formula_sum '[Rb6 V6 Hg3 O21]'
_cell_volume [743.6449]
_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
[
  Rb  Rb0  6  0.0000  0.0000  0.2375  1.0
  V  V1  6  0.0000  0.0000  0.0803  1.0
  Hg  Hg2  3  -0.0000  -0.0000  0.5000  1.0
  O  O3  18  0.0300  0.5150  0.7724  1.0
  O  O4  3  0.0000  0.0000  0.0000  1.0
]