data_[K3Nd6Sb3O18]
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
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.9866]
_cell_length_b [5.9866]
_cell_length_c [15.8780]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [KNd2SbO6]
_chemical_formula_sum '[K3 Nd6 Sb3 O18]'
_cell_volume [492.8198]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.7918  1.0
  Nd  Nd1  3  0.0000  0.0000  0.0162  1.0
  Nd  Nd2  3  0.0000  0.0000  0.5284  1.0
  Sb  Sb3  3  0.0000  0.0000  0.3236  1.0
  O  O4  9  0.0428  0.3707  0.9259  1.0
  O  O5  9  0.0995  0.7110  0.0746  1.0
]