data_[Na2Al2Hg4F16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  Hg  2.0000  1.5000  1.2450
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.1800]
_cell_length_b [7.1475]
_cell_length_c [6.9908]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.6113]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaAlHg2F8]
_chemical_formula_sum '[Na2 Al2 Hg4 F16]'
_cell_volume [358.7408]
_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
[
  Na  Na0  2  0.0000  0.0000  0.5000  1.0
  Al  Al1  2  0.0000  0.0000  0.0000  1.0
  Hg  Hg2  4  0.0074  0.5000  0.7571  1.0
  F  F3  8  0.0033  0.1745  0.1916  1.0
  F  F4  4  0.1957  0.5000  0.4942  1.0
  F  F5  4  0.2377  0.5000  0.0018  1.0
]