data_[Na4Hg8Bi8]
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/c]
_cell_length_a [6.1064]
_cell_length_b [13.2300]
_cell_length_c [8.0711]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.3151]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na(HgBi)2]
_chemical_formula_sum '[Na4 Hg8 Bi8]'
_cell_volume [631.7951]
_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  0.1371  0.2500  1.0
  Hg  Hg1  8  0.0065  0.3219  0.9620  1.0
  Bi  Bi2  4  0.0000  0.1304  0.7500  1.0
  Bi  Bi3  4  0.0000  0.4682  0.2500  1.0
]