data_[Na4Hg12Pb4]
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 [Pnma]
_cell_length_a [11.7807]
_cell_length_b [3.4367]
_cell_length_c [14.1564]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [NaHg3Pb]
_chemical_formula_sum '[Na4 Hg12 Pb4]'
_cell_volume [573.1560]
_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  0.1251  0.2500  0.6320  1.0
  Hg  Hg1  4  0.1112  0.7500  0.2214  1.0
  Hg  Hg2  4  0.1192  0.2500  0.4168  1.0
  Hg  Hg3  4  0.1352  0.7500  0.8153  1.0
  Pb  Pb4  4  0.1191  0.2500  0.0184  1.0
]