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 [7.9313]
_cell_length_b [7.8748]
_cell_length_c [8.1595]
_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 [509.6227]
_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  0.9865  1
  Nd  Nd1  2  0.0000  0.0000  0.5072  1
  Nb  Nb2  8  0.2518  0.2490  0.2359  1
  O  O3  8  0.2351  0.2488  0.5043  1
  O  O4  4  0.0000  0.2049  0.7433  1
  O  O5  4  0.1987  0.0000  0.2764  1
  O  O6  4  0.2745  0.0000  0.7469  1
  O  O7  4  0.5000  0.2168  0.2510  1
]