data_[Ac4Pr4Nd8Er20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Pr  1.1300  1.8500  1.0600
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.7996]
_cell_length_b [8.7996]
_cell_length_c [15.7729]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [AcPrNd2Er5]
_chemical_formula_sum '[Ac4 Pr4 Nd8 Er20]'
_cell_volume [1221.3535]
_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  0.0000  0.0000  0.2500  1
  Pr  Pr1  4  0.0000  0.5000  0.2500  1
  Nd  Nd2  8  0.1176  0.6176  0.5000  1
  Er  Er3  16  0.2065  0.2935  0.3678  1
  Er  Er4  4  0.0000  0.0000  0.0000  1
]