data_[Tb20Y8Tm8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Y  1.2200  1.8000  1.0400
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [14.8275]
_cell_length_b [11.6885]
_cell_length_c [6.7026]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Tb5(YTm)2]
_chemical_formula_sum '[Tb20 Y8 Tm8]'
_cell_volume [1161.6344]
_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  0.0513  0.7482  0.7102  1
  Tb  Tb1  8  0.1433  0.2359  0.8868  1
  Tb  Tb2  4  0.2500  0.7465  0.4023  1
  Y  Y3  8  0.1266  0.9980  0.5564  1
  Tm  Tm4  4  0.0000  0.0000  0.0180  1
  Tm  Tm5  4  0.2500  0.0124  0.1090  1
]