data_[K2Hf2Se4O16]
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
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.8869]
_cell_length_b [5.8282]
_cell_length_c [8.1592]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.5735]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [KHf(SeO4)2]
_chemical_formula_sum '[K2 Hf2 Se4 O16]'
_cell_volume [422.1744]
_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  2  0.0000  0.0000  0.5000  1.0
  Hf  Hf1  2  0.0000  0.0000  0.0000  1.0
  Se  Se2  4  0.1307  0.5000  0.7923  1.0
  O  O3  8  0.0264  0.2427  0.8143  1.0
  O  O4  4  0.1957  0.5000  0.6059  1.0
  O  O5  4  0.2293  0.0000  0.0519  1.0
]