data_[Pm6Pr18Y18]
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
  Y  1.2200  1.8000  1.0400
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [9.4962]
_cell_length_b [9.4962]
_cell_length_c [18.8738]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm(PrY)3]
_chemical_formula_sum '[Pm6 Pr18 Y18]'
_cell_volume [1473.9600]
_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
[
  Pr  Pr0  18  0.0511  0.8096  0.0762  1
  Pm  Pm1  6  0.0000  0.0000  0.4085  1
  Y  Y2  18  0.0494  0.8128  0.2586  1
]