data_[Tb20Pm4Pr4]
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 [11.8232]
_cell_length_b [6.8571]
_cell_length_c [12.2286]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.7884]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Tb5PmPr]
_chemical_formula_sum '[Tb20 Pm4 Pr4]'
_cell_volume [932.8638]
_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  0.0778  0.2726  0.9993  1
  Tb  Tb1  8  0.2199  0.3647  0.7510  1
  Tb  Tb2  4  0.0000  0.4116  0.2500  1
  Pr  Pr3  4  0.0000  0.0276  0.7500  1
  Pm  Pm4  4  0.2500  0.2500  0.5000  1
]