data_[Rb4I2O8F4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.6994]
_cell_length_b [6.0984]
_cell_length_c [5.1225]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.5868]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2I(O2F)2]
_chemical_formula_sum '[Rb4 I2 O8 F4]'
_cell_volume [333.8955]
_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  4  0.1613  0.5000  0.1947  1.0
  I  I1  2  0.0000  0.0000  0.5000  1.0
  O  O2  8  0.0751  0.2160  0.7045  1.0
  F  F3  4  0.1500  0.0000  0.2818  1.0
]