data_[Rb2Tl2Pb2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [I4mm]
_cell_length_a [4.3171]
_cell_length_b [4.3171]
_cell_length_c [17.0222]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [RbTlPbF4]
_chemical_formula_sum '[Rb2 Tl2 Pb2 F8]'
_cell_volume [317.2525]
_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
[
  Rb  Rb0  2  0.0000  0.0000  0.6462  1
  Tl  Tl1  2  0.0000  0.0000  0.3188  1
  Pb  Pb2  2  0.0000  0.0000  0.9725  1
  F  F3  4  0.0000  0.5000  0.0279  1
  F  F4  2  0.0000  0.0000  0.1845  1
  F  F5  2  0.0000  0.0000  0.8221  1
]