data_[Na2Tl2Pb2F8]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.2616]
_cell_length_b [6.0715]
_cell_length_c [7.8801]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.9836]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaTlPbF4]
_chemical_formula_sum '[Na2 Tl2 Pb2 F8]'
_cell_volume [287.9977]
_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  0.1288  0.7500  0.2583  1
  Tl  Tl1  2  0.3894  0.7500  0.8652  1
  Pb  Pb2  2  0.2990  0.2500  0.5414  1
  F  F3  4  0.3971  0.0001  0.3027  1
  F  F4  2  0.1194  0.7500  0.5433  1
  F  F5  2  0.2333  0.2500  0.8275  1
]