data_[Ac2La20Tb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  La  1.1000  1.9500  1.1720
  Tb  1.1000  1.7500  0.9815
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [12.7749]
_cell_length_b [12.7749]
_cell_length_c [7.0597]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [Ac(La5Tb2)2]
_chemical_formula_sum '[Ac2 La20 Tb8]'
_cell_volume [1152.1345]
_cell_formula_units_Z [2]
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
[
  La  La0  16  0.1272  0.7098  0.2425  1
  Tb  Tb1  8  0.0678  0.1749  0.5000  1
  La  La2  4  0.0000  0.5000  0.2500  1
  Ac  Ac3  2  0.0000  0.0000  0.0000  1
]