data_[Na4Tl4Pb2O12]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.9505]
_cell_length_b [10.1136]
_cell_length_c [6.0115]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.6812]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Tl2PbO6]
_chemical_formula_sum '[Na4 Tl4 Pb2 O12]'
_cell_volume [340.6433]
_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  0.0000  0.1726  0.0000  1
  Tl  Tl1  4  0.0000  0.3351  0.5000  1
  Pb  Pb2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.2240  0.1661  0.7141  1
  O  O4  4  0.2441  0.0000  0.2934  1
]