data_[Na4Ag4Hg16]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.3366]
_cell_length_b [18.0958]
_cell_length_c [5.3117]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.6134]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaAgHg4]
_chemical_formula_sum '[Na4 Ag4 Hg16]'
_cell_volume [594.3633]
_cell_formula_units_Z [4]
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  4  0.0000  0.3843  0.2500  1.0
  Ag  Ag1  4  0.0000  0.1453  0.7500  1.0
  Hg  Hg2  8  0.2329  0.9584  0.6628  1.0
  Hg  Hg3  8  0.2492  0.7919  0.7514  1.0
]