data_[K2Nd2Nb8O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Nd  1.1400  1.8500  1.2765
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [7.9987]
_cell_length_b [7.9463]
_cell_length_c [7.9741]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [KNdNb4O12]
_chemical_formula_sum '[K2 Nd2 Nb8 O24]'
_cell_volume [506.8332]
_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  0.5000  0.0000  0.9849  1.0
  Nd  Nd1  2  0.0000  0.0000  0.5218  1.0
  Nb  Nb2  8  0.2527  0.2473  0.2441  1.0
  O  O3  8  0.2384  0.2305  0.0010  1.0
  O  O4  4  0.0000  0.2134  0.7393  1.0
  O  O5  4  0.2037  0.0000  0.2887  1.0
  O  O6  4  0.2651  0.0000  0.7222  1.0
  O  O7  4  0.5000  0.2226  0.2513  1.0
]