data_[Na3Nd6Bi3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Nd  1.1400  1.8500  1.2765
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.9457]
_cell_length_b [5.9457]
_cell_length_c [15.4278]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaNd2BiO6]
_chemical_formula_sum '[Na3 Nd6 Bi3 O18]'
_cell_volume [472.3284]
_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
[
  Na  Na0  3  0.0000  0.0000  0.8032  1.0
  Nd  Nd1  3  0.0000  0.0000  0.0280  1.0
  Nd  Nd2  3  0.0000  0.0000  0.5299  1.0
  Bi  Bi3  3  0.0000  0.0000  0.3175  1.0
  O  O4  9  0.0014  0.3758  0.5840  1.0
  O  O5  9  0.0030  0.7266  0.4103  1.0
]