data_[Rb2I2O8]
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 [P2_1/c]
_cell_length_a [6.5857]
_cell_length_b [5.3875]
_cell_length_c [5.3693]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.7876]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [RbIO4]
_chemical_formula_sum '[Rb2 I2 O8]'
_cell_volume [190.4860]
_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  0.5000  0.0000  0.5000  1.0
  I  I1  2  0.0000  0.0000  0.0000  1.0
  O  O2  4  0.0807  0.2004  0.2971  1.0
  O  O3  4  0.2670  0.5818  0.4900  1.0
]