data_[Na3Pm6I3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pm  1.1300  1.8500  1.1100
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.9848]
_cell_length_b [5.9848]
_cell_length_c [15.2332]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaPm2IO6]
_chemical_formula_sum '[Na3 Pm6 I3 O18]'
_cell_volume [472.5217]
_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  0.4866  1
  Pm  Pm1  3  0.0000  0.0000  0.2207  1
  Pm  Pm2  3  0.0000  0.0000  0.7021  1
  I  I3  3  0.0000  0.0000  0.0068  1
  O  O4  9  0.0016  0.7418  0.0889  1
  O  O5  9  0.0114  0.3112  0.6059  1
]