data_[K4Hf4O10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Hf  1.3000  1.5500  0.8500
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.3653]
_cell_length_b [3.9642]
_cell_length_c [6.8996]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.7454]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Hf2O5]
_chemical_formula_sum '[K4 Hf4 O10]'
_cell_volume [335.1213]
_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
[
  K  K0  4  0.1142  0.5000  0.3778  1.0
  Hf  Hf1  4  0.1466  0.0000  0.9061  1.0
  O  O2  4  0.1331  0.0000  0.6318  1.0
  O  O3  4  0.1807  0.5000  0.9927  1.0
  O  O4  2  0.0000  0.0000  0.0000  1.0
]