data_[Sr3Ac36Pb21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ac  1.1000  1.9500  1.2600
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [17.1713]
_cell_length_b [17.1713]
_cell_length_c [9.6527]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [SrAc12Pb7]
_chemical_formula_sum '[Sr3 Ac36 Pb21]'
_cell_volume [2464.8355]
_cell_formula_units_Z [3]
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
[
  Sr  Sr0  3  0.0000  0.0000  0.0000  1
  Ac  Ac1  18  0.0000  0.2709  0.0000  1
  Ac  Ac2  18  0.1066  0.2131  0.3766  1
  Pb  Pb3  18  0.1081  0.2163  0.7550  1
  Pb  Pb4  3  0.0000  0.0000  0.5000  1
]