data_[Na16Hg6Sb4]
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
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.7557]
_cell_length_b [10.6787]
_cell_length_c [5.3496]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.5676]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na8Hg3Sb2]
_chemical_formula_sum '[Na16 Hg6 Sb4]'
_cell_volume [760.5607]
_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  8  0.1468  0.2301  0.5798  1
  Na  Na1  4  0.0627  0.5000  0.7977  1
  Na  Na2  4  0.1745  0.0000  0.0604  1
  Hg  Hg3  4  0.0000  0.2161  0.0000  1
  Hg  Hg4  2  0.0000  0.0000  0.5000  1
  Sb  Sb5  4  0.1926  0.5000  0.3706  1
]