data_[Pr6Ti3Al3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pr  1.1300  1.8500  1.0600
  Ti  1.5400  1.4000  0.8517
  Al  1.6100  1.2500  0.6750
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [5.5840]
_cell_length_b [5.5840]
_cell_length_c [13.0528]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pr2TiAlO6]
_chemical_formula_sum '[Pr6 Ti3 Al3 O18]'
_cell_volume [352.4769]
_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
[
  Pr  Pr0  6  0.0000  0.0000  0.2502  1.0
  Ti  Ti1  3  0.0000  0.0000  0.0000  1.0
  Al  Al2  3  -0.0000  0.0000  0.5000  1.0
  O  O3  18  0.0149  0.5752  0.2498  1.0
]