data_[Pm20Nd8Ho4Er4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Nd  1.1400  1.8500  1.2765
  Ho  1.2300  1.7500  1.0410
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.6129]
_cell_length_b [8.6129]
_cell_length_c [16.5853]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [Pm5Nd2HoEr]
_chemical_formula_sum '[Pm20 Nd8 Ho4 Er4]'
_cell_volume [1230.3327]
_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
[
  Pm  Pm0  16  0.2171  0.2829  0.3570  1
  Pm  Pm1  4  0.0000  0.0000  0.0000  1
  Nd  Nd2  8  0.1212  0.3788  0.0000  1
  Ho  Ho3  4  0.0000  0.0000  0.2500  1
  Er  Er4  4  0.0000  0.5000  0.2500  1
]