data_[Na2Hg7Pb3]
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/m]
_cell_length_a [4.1326]
_cell_length_b [4.8333]
_cell_length_c [18.0904]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.3270]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Na2Hg7Pb3]
_chemical_formula_sum '[Na2 Hg7 Pb3]'
_cell_volume [359.1387]
_cell_formula_units_Z [1]
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  0.3619  0.5000  0.7154  1.0
  Hg  Hg1  2  0.0706  0.5000  0.1502  1.0
  Hg  Hg2  2  0.2075  0.5000  0.4197  1.0
  Hg  Hg3  2  0.4280  0.0000  0.8402  1.0
  Hg  Hg4  1  0.0000  0.0000  0.0000  1.0
  Pb  Pb5  2  0.2888  0.0000  0.5736  1.0
  Pb  Pb6  1  0.5000  0.5000  0.0000  1.0
]