data_[Rb2Pb2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Pb  2.3300  1.8000  1.1225
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.6996]
_cell_length_b [6.1080]
_cell_length_c [6.3164]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.8716]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [RbPbF4]
_chemical_formula_sum '[Rb2 Pb2 F8]'
_cell_volume [256.0404]
_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  0.0000  1
  Pb  Pb1  2  0.5000  0.0000  0.5000  1
  F  F2  4  0.1903  0.6196  0.9105  1
  F  F3  4  0.4036  0.2149  0.7682  1
]