data_[K8Nb8O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [11.7509]
_cell_length_b [10.7945]
_cell_length_c [5.3276]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.0627]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [KNbO3]
_chemical_formula_sum '[K8 Nb8 O24]'
_cell_volume [675.6613]
_cell_formula_units_Z [8]
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  8  0.2096  0.3992  0.3181  1.0
  Nb  Nb1  4  0.0000  0.0830  0.2500  1.0
  Nb  Nb2  4  0.0000  0.2568  0.7500  1.0
  O  O3  8  0.0894  0.2028  0.4388  1.0
  O  O4  8  0.0906  0.0659  0.9334  1.0
  O  O5  8  0.1098  0.3606  0.8698  1.0
]