data_[Ac20Sn8Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Sn  1.9600  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Cmce]
_cell_length_a [17.1577]
_cell_length_b [8.9296]
_cell_length_c [8.9524]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [64]
_chemical_formula_structural [Ac5(SnPb)2]
_chemical_formula_sum '[Ac20 Sn8 Pb8]'
_cell_volume [1371.6146]
_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  16  0.1377  0.1740  0.3296  1
  Ac  Ac1  4  0.0000  0.0000  0.0000  1
  Sn  Sn2  8  0.0000  0.1233  0.6250  1
  Pb  Pb3  8  0.2057  0.0000  0.0000  1
]