data_[Ac4Pm8Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Pm  1.1300  1.8500  1.1100
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [13.9342]
_cell_length_b [5.6543]
_cell_length_c [6.9935]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [AcPm2Pb]
_chemical_formula_sum '[Ac4 Pm8 Pb4]'
_cell_volume [551.0072]
_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  0.1414  0.2500  0.0849  1
  Pm  Pm1  4  0.0481  0.7500  0.3526  1
  Pm  Pm2  4  0.2006  0.2500  0.5952  1
  Pb  Pb3  4  0.1046  0.7500  0.8050  1
]