data_[Na6Hg6Sb6Pb3]
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
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.0926]
_cell_length_b [5.0926]
_cell_length_c [25.7374]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na2Hg2Sb2Pb]
_chemical_formula_sum '[Na6 Hg6 Sb6 Pb3]'
_cell_volume [578.0640]
_cell_formula_units_Z [3]
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  0.0000  0.0000  0.1372  1.0
  Hg  Hg1  6  0.0000  0.0000  0.4373  1.0
  Sb  Sb2  6  0.0000  0.0000  0.2657  1.0
  Pb  Pb3  3  0.0000  0.0000  0.0000  1.0
]