data_[Ac4Pm20Y4]
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
  Y  1.2200  1.8000  1.0400
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [8.9621]
_cell_length_b [10.1152]
_cell_length_c [11.7696]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.8207]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [AcPm5Y]
_chemical_formula_sum '[Ac4 Pm20 Y4]'
_cell_volume [1009.9100]
_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  0.2500  0.2500  0.5000  1
  Pm  Pm1  8  0.1261  0.0733  0.1685  1
  Pm  Pm2  8  0.1706  0.3960  0.0342  1
  Pm  Pm3  4  0.0000  0.4196  0.2500  1
  Y  Y4  4  0.0000  0.2397  0.7500  1
]