data_[Na6Hg3Sb3Cl18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
  Sb  2.0500  1.4500  0.8300
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.1422]
_cell_length_b [7.1422]
_cell_length_c [19.6830]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Na2HgSbCl6]
_chemical_formula_sum '[Na6 Hg3 Sb3 Cl18]'
_cell_volume [869.5424]
_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
[
  Na  Na0  3  0.0000  0.0000  0.0078  1.0
  Na  Na1  3  0.0000  0.0000  0.5210  1.0
  Hg  Hg2  3  0.0000  0.0000  0.8175  1.0
  Sb  Sb3  3  0.0000  0.0000  0.3258  1.0
  Cl  Cl4  9  0.0254  0.3362  0.9194  1.0
  Cl  Cl5  9  0.0478  0.6753  0.0769  1.0
]