data_[Ac12Cu4Pb8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Cu  1.9000  1.3500  0.8200
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [13.2975]
_cell_length_b [4.8066]
_cell_length_c [13.0693]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Ac3CuPb2]
_chemical_formula_sum '[Ac12 Cu4 Pb8]'
_cell_volume [835.3237]
_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  4  0.0613  0.2500  0.3780  1
  Ac  Ac1  4  0.1193  0.7500  0.9470  1
  Ac  Ac2  4  0.2237  0.2500  0.7049  1
  Cu  Cu3  4  0.1297  0.2500  0.1430  1
  Pb  Pb4  4  0.0140  0.7500  0.1909  1
  Pb  Pb5  4  0.1961  0.7500  0.5072  1
]