data_[Na3Pr6U3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pr  1.1300  1.8500  1.0600
  U  1.3800  1.7500  0.9913
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.0471]
_cell_length_b [6.0471]
_cell_length_c [15.4713]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [NaPr2UO6]
_chemical_formula_sum '[Na3 Pr6 U3 O18]'
_cell_volume [489.9509]
_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  0.1962  1
  Pr  Pr1  3  0.0000  0.0000  0.4676  1
  Pr  Pr2  3  0.0000  0.0000  0.9746  1
  U  U3  3  0.0000  0.0000  0.6831  1
  O  O4  9  0.0004  0.7302  0.5918  1
  O  O5  9  0.0378  0.3371  0.7471  1
]