data_[Na4Hf2H4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Hf  1.3000  1.5500  0.8500
  H  2.2000  0.2500  0.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.8111]
_cell_length_b [3.1414]
_cell_length_c [5.9662]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1916]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Hf(HO2)2]
_chemical_formula_sum '[Na4 Hf2 H4 O8]'
_cell_volume [191.3646]
_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  4  0.1400  0.0000  0.5620  1.0
  Hf  Hf1  2  0.0000  0.0000  0.0000  1.0
  H  H2  4  0.2309  0.5000  0.8645  1.0
  O  O3  4  0.0286  0.5000  0.7880  1.0
  O  O4  4  0.2022  0.0000  0.2139  1.0
]