data_[Ac8Tb12Pm4]
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 [C2/m]
_cell_length_a [15.8112]
_cell_length_b [5.2764]
_cell_length_c [11.7371]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.5692]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ac2Tb3Pm]
_chemical_formula_sum '[Ac8 Tb12 Pm4]'
_cell_volume [875.7679]
_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  0.0345  0.5000  0.8640  1
  Tb  Tb1  4  0.0475  0.0000  0.3874  1
  Tb  Tb2  4  0.1227  0.5000  0.6141  1
  Ac  Ac3  4  0.2086  0.0000  0.8651  1
  Tb  Tb4  4  0.2114  0.5000  0.3851  1
  Pm  Pm5  4  0.1283  0.0000  0.1351  1
]