data_[Tb20Pm8Pr4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Pm  1.1300  1.8500  1.1100
  Pr  1.1300  1.8500  1.0600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [16.4796]
_cell_length_b [10.0074]
_cell_length_c [6.5244]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.8847]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Tb5Pm2Pr]
_chemical_formula_sum '[Tb20 Pm8 Pr4]'
_cell_volume [1065.8094]
_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
[
  Tb  Tb0  8  0.0985  0.4120  0.6415  1
  Tb  Tb1  8  0.1962  0.0906  0.5207  1
  Tb  Tb2  4  0.0000  0.0569  0.7500  1
  Pm  Pm3  8  0.0760  0.2526  0.1130  1
  Pr  Pr4  4  0.2500  0.2500  0.0000  1
]