data_[Na8Hg8Bi4]
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
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.4886]
_cell_length_b [5.1193]
_cell_length_c [9.8704]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.8277]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Hg2Bi]
_chemical_formula_sum '[Na8 Hg8 Bi4]'
_cell_volume [561.1839]
_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  0.0664  0.5000  0.3618  1.0
  Na  Na1  4  0.1683  0.5000  0.0460  1.0
  Hg  Hg2  4  0.0415  0.0000  0.8598  1.0
  Hg  Hg3  4  0.1307  0.0000  0.5693  1.0
  Bi  Bi4  4  0.2484  0.5000  0.7228  1.0
]