data_[Pm24Pu3Si18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Pu  1.2800  1.7500  0.9675
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [8.7697]
_cell_length_b [8.7697]
_cell_length_c [18.5200]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm8PuSi6]
_chemical_formula_sum '[Pm24 Pu3 Si18]'
_cell_volume [1233.5125]
_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
[
  Pm  Pm0  18  0.0020  0.3295  0.1038  1
  Pm  Pm1  6  0.0000  0.0000  0.3321  1
  Pu  Pu2  3  0.0000  0.0000  0.0000  1
  Si  Si3  18  0.0007  0.3360  0.9329  1
]