data_[Na3Y6Sb3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Y  1.2200  1.8000  1.0400
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.6984]
_cell_length_b [5.6984]
_cell_length_c [15.1361]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaY2SbO6]
_chemical_formula_sum '[Na3 Y6 Sb3 O18]'
_cell_volume [425.6533]
_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  0.7992  1.0
  Y  Y1  3  0.0000  0.0000  0.0206  1.0
  Y  Y2  3  0.0000  0.0000  0.5273  1.0
  Sb  Sb3  3  0.0000  0.0000  0.3214  1.0
  O  O4  9  0.0401  0.3479  0.9216  1.0
  O  O5  9  0.0670  0.6784  0.0761  1.0
]