data_[Na4Mg2Tl4Pb2]
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 [Pmc2_1]
_cell_length_a [4.4660]
_cell_length_b [10.3542]
_cell_length_c [7.2939]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Na2MgTl2Pb]
_chemical_formula_sum '[Na4 Mg2 Tl4 Pb2]'
_cell_volume [337.2843]
_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  0.0000  0.1805  0.3819  1.0
  Na  Na1  2  0.5000  0.0023  0.6317  1.0
  Mg  Mg2  2  0.0000  0.4836  0.8848  1.0
  Tl  Tl3  2  0.0000  0.1710  0.8825  1.0
  Tl  Tl4  2  0.5000  0.3344  0.1417  1.0
  Pb  Pb5  2  0.5000  0.3468  0.6231  1.0
]