data_[Rb2Na2Hg2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.8411]
_cell_length_b [7.5622]
_cell_length_c [8.9805]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.4792]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaHgCl4]
_chemical_formula_sum '[Rb2 Na2 Hg2 Cl8]'
_cell_volume [456.8494]
_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
[
  Rb  Rb0  2  0.1977  0.2500  0.0335  1.0
  Na  Na1  2  0.1165  0.2500  0.5014  1.0
  Hg  Hg2  2  0.3028  0.7500  0.3133  1.0
  Cl  Cl3  4  0.0044  0.5116  0.2865  1.0
  Cl  Cl4  2  0.3439  0.7500  0.0478  1.0
  Cl  Cl5  2  0.4994  0.2500  0.4342  1.0
]