data_[Na8Tl4Hg4Pb2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.8824]
_cell_length_b [5.4817]
_cell_length_c [6.0148]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.0345]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na4Tl2Hg2Pb]
_chemical_formula_sum '[Na8 Tl4 Hg4 Pb2]'
_cell_volume [503.2926]
_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  4  0.1196  0.0000  0.5911  1.0
  Na  Na1  4  0.1455  0.5000  0.2768  1.0
  Tl  Tl2  4  0.2361  0.0000  0.1570  1.0
  Hg  Hg3  4  0.0548  0.5000  0.7534  1.0
  Pb  Pb4  2  0.0000  0.0000  0.0000  1.0
]