data_[Na3Y6Ir3O18]
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
  Ir  2.2000  1.3500  0.7650
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.6352]
_cell_length_b [5.6352]
_cell_length_c [15.0982]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaY2IrO6]
_chemical_formula_sum '[Na3 Y6 Ir3 O18]'
_cell_volume [415.2093]
_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  0.8016  1.0
  Y  Y1  3  0.0000  0.0000  0.0171  1.0
  Y  Y2  3  0.0000  0.0000  0.5271  1.0
  Ir  Ir3  3  0.0000  0.0000  0.3246  1.0
  O  O4  9  0.0414  0.3501  0.9214  1.0
  O  O5  9  0.0606  0.6709  0.0756  1.0
]