data_[Pm20Pr8Nd8]
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
  Nd  1.1400  1.8500  1.2765
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [15.1730]
_cell_length_b [12.1410]
_cell_length_c [6.9003]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Pm5(PrNd)2]
_chemical_formula_sum '[Pm20 Pr8 Nd8]'
_cell_volume [1271.1256]
_cell_formula_units_Z [4]
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  8  0.0532  0.7476  0.7068  1
  Pm  Pm1  8  0.1428  0.2327  0.8872  1
  Pr  Pr2  4  0.0000  0.0000  0.0250  1
  Pr  Pr3  4  0.2500  0.0045  0.0934  1
  Pm  Pm4  4  0.2500  0.7363  0.9100  1
  Nd  Nd5  8  0.1260  0.4968  0.0599  1
]