data_[Na4Mg2Tl8Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  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 [16.2275]
_cell_length_b [3.9775]
_cell_length_c [8.3825]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.5944]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Mg(Tl2Pb)2]
_chemical_formula_sum '[Na4 Mg2 Tl8 Pb4]'
_cell_volume [525.8866]
_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  0.1181  0.0000  0.6341  1.0
  Mg  Mg1  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  4  0.0396  0.5000  0.3088  1.0
  Tl  Tl3  4  0.2070  0.0000  0.3062  1.0
  Pb  Pb4  4  0.1569  0.5000  0.9767  1.0
]