data_[Na2Ag1Hg1Cl6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [7.5012]
_cell_length_b [7.5012]
_cell_length_c [5.1986]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [Na2AgHgCl6]
_chemical_formula_sum '[Na2 Ag1 Hg1 Cl6]'
_cell_volume [292.5131]
_cell_formula_units_Z [1]
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  2  0.0000  0.5000  0.9084  1.0
  Ag  Ag1  1  0.5000  0.5000  0.6943  1.0
  Hg  Hg2  1  0.0000  0.0000  0.6833  1.0
  Cl  Cl3  4  0.2524  0.2524  0.7160  1.0
  Cl  Cl4  1  0.0000  0.0000  0.1913  1.0
  Cl  Cl5  1  0.5000  0.5000  0.1969  1.0
]