data_[Ce3Pr3I18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Pr  1.1300  1.8500  1.0600
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [7.8563]
_cell_length_b [7.8563]
_cell_length_c [21.5132]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [CePrI6]
_chemical_formula_sum '[Ce3 Pr3 I18]'
_cell_volume [1149.9345]
_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
[
  Ce  Ce0  3  0.0000  0.0000  0.0000  1.0
  Pr  Pr1  3  -0.0000  0.0000  0.5000  1.0
  I  I2  18  0.0004  0.6620  0.7502  1.0
]