data_[Rb2Fe2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Fe  1.8300  1.4000  0.8525
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [5.4252]
_cell_length_b [5.4338]
_cell_length_c [7.5101]
_cell_angle_alpha [110.5900]
_cell_angle_beta [110.3882]
_cell_angle_gamma [90.0642]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [RbFeF4]
_chemical_formula_sum '[Rb2 Fe2 F8]'
_cell_volume [192.3281]
_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  0.2549  0.7485  0.5090  1.0
  Fe  Fe1  1  0.0000  0.0000  0.0000  1.0
  Fe  Fe2  1  0.5000  0.5000  0.0000  1.0
  F  F3  2  0.1473  0.0974  0.2895  1.0
  F  F4  2  0.2109  0.3281  0.0398  1.0
  F  F5  2  0.2940  0.7943  0.9678  1.0
  F  F6  2  0.3435  0.3187  0.7102  1.0
]