data_[Ac8Tb8Pm6]
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
  Pm  1.1300  1.8500  1.1100
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.7793]
_cell_length_b [5.2066]
_cell_length_c [41.3306]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Ac4Tb4Pm3]
_chemical_formula_sum '[Ac8 Tb8 Pm6]'
_cell_volume [813.2842]
_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
[
  Ac  Ac0  4  0.0000  0.5000  0.0465  1
  Tb  Tb1  4  0.0000  0.5000  0.2292  1
  Ac  Ac2  4  0.0000  0.5000  0.3166  1
  Tb  Tb3  4  0.0000  0.5000  0.4070  1
  Pm  Pm4  4  0.0000  0.5000  0.1358  1
  Pm  Pm5  2  0.0000  0.5000  0.5000  1
]