data_[Ac20Tb4Y8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Tb  1.1000  1.7500  0.9815
  Y  1.2200  1.8000  1.0400
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.5454]
_cell_length_b [27.5226]
_cell_length_c [6.5420]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.0004]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Ac5TbY2]
_chemical_formula_sum '[Ac20 Tb4 Y8]'
_cell_volume [1358.3688]
_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
[
  Ac  Ac0  8  0.1356  0.1861  0.5001  1
  Ac  Ac1  8  0.2317  0.0825  0.7868  1
  Tb  Tb2  4  0.0000  0.0409  0.2500  1
  Ac  Ac3  4  0.0000  0.3721  0.7500  1
  Y  Y4  4  0.0000  0.5000  0.0000  1
  Y  Y5  4  0.2500  0.2500  0.0000  1
]