data_[Tb20Er8Tm8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [14.8653]
_cell_length_b [12.6442]
_cell_length_c [6.0650]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Tb5(ErTm)2]
_chemical_formula_sum '[Tb20 Er8 Tm8]'
_cell_volume [1139.9620]
_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  0.0481  0.2005  0.7104  1
  Tb  Tb1  8  0.1433  0.6877  0.5419  1
  Tb  Tb2  4  0.2500  0.1821  0.4558  1
  Er  Er3  4  0.0000  0.0000  0.1112  1
  Er  Er4  4  0.2500  0.0518  0.9910  1
  Tm  Tm5  8  0.1351  0.9524  0.5506  1
]