data_[Tb20Tl4Ag8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Tl  1.6200  1.9000  1.3325
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.1068]
_cell_length_b [8.1068]
_cell_length_c [13.4776]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [Tb5TlAg2]
_chemical_formula_sum '[Tb20 Tl4 Ag8]'
_cell_volume [885.7550]
_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  16  0.1554  0.3446  0.3507  1.0
  Tb  Tb1  4  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  4  0.0000  0.0000  0.2500  1.0
  Ag  Ag3  8  0.1328  0.6328  0.5000  1.0
]