data_[Na6Tl4Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.8222]
_cell_length_b [5.0210]
_cell_length_c [7.1576]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.6301]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3(TlPb)2]
_chemical_formula_sum '[Na6 Tl4 Pb4]'
_cell_volume [423.4819]
_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  4  0.2111  0.5000  0.1697  1.0
  Na  Na1  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  4  0.1348  0.0000  0.4149  1.0
  Pb  Pb3  4  0.0743  0.5000  0.7031  1.0
]