data_[Na2H8I2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  H  2.2000  0.2500  0.0000
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [6.0064]
_cell_length_b [7.1611]
_cell_length_c [7.2666]
_cell_angle_alpha [62.2510]
_cell_angle_beta [65.7142]
_cell_angle_gamma [80.5515]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [NaH4IO2]
_chemical_formula_sum '[Na2 H8 I2 O4]'
_cell_volume [251.9837]
_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
[
  Na  Na0  2  0.3209  0.4785  0.8632  1.0
  H  H1  2  0.0442  0.2667  0.3452  1.0
  H  H2  2  0.0542  0.8594  0.7351  1.0
  H  H3  2  0.2020  0.7182  0.1361  1.0
  H  H4  2  0.3785  0.8587  0.8947  1.0
  I  I5  2  0.2388  0.2218  0.6198  1.0
  O  O6  2  0.0012  0.7165  0.7777  1.0
  O  O7  2  0.3584  0.7143  0.0170  1.0
]