data_[Na6Hg6Pb2]
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
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [P6_3/m]
_cell_length_a [8.9379]
_cell_length_b [8.9379]
_cell_length_c [5.4291]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [176]
_chemical_formula_structural [Na3Hg3Pb]
_chemical_formula_sum '[Na6 Hg6 Pb2]'
_cell_volume [375.5976]
_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  6  0.0943  0.4570  0.7500  1.0
  Hg  Hg1  6  0.0566  0.2445  0.2500  1.0
  Pb  Pb2  2  0.3333  0.6667  0.2500  1.0
]