data_[Rb8I4O20]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.7153]
_cell_length_b [6.5671]
_cell_length_c [7.6572]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.1873]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb2IO5]
_chemical_formula_sum '[Rb8 I4 O20]'
_cell_volume [583.6810]
_cell_formula_units_Z [4]
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  8  0.1650  0.0068  0.4565  1
  I  I1  4  0.0000  0.5000  0.0000  1
  O  O2  8  0.0545  0.2451  0.6128  1
  O  O3  8  0.1504  0.4038  0.1207  1
  O  O4  4  0.0000  0.3924  0.2500  1
]