data_[Pm18Pr6N18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [6.3543]
_cell_length_b [6.3543]
_cell_length_c [27.5877]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm3PrN3]
_chemical_formula_sum '[Pm18 Pr6 N18]'
_cell_volume [964.6889]
_cell_formula_units_Z [6]
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
[
  Pm  Pm0  18  0.0001  0.3167  0.8992  1
  Pr  Pr1  6  0.0000  0.0000  0.3333  1
  N  N2  18  0.0004  0.6340  0.9382  1
]