data_[Na6Hg2Pb2]
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 [P2_1/m]
_cell_length_a [7.3828]
_cell_length_b [4.9885]
_cell_length_c [7.6364]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.3441]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Na3HgPb]
_chemical_formula_sum '[Na6 Hg2 Pb2]'
_cell_volume [280.7633]
_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  2  0.1808  0.7500  0.0505  1
  Na  Na1  2  0.2556  0.2500  0.7639  1
  Na  Na2  2  0.3432  0.7500  0.4580  1
  Hg  Hg3  2  0.4563  0.2500  0.1610  1
  Pb  Pb4  2  0.0573  0.2500  0.3576  1
]