data_[Pm22Nd8Er18]
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
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [16.8964]
_cell_length_b [25.4974]
_cell_length_c [3.7106]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [Pm11Nd4Er9]
_chemical_formula_sum '[Pm22 Nd8 Er18]'
_cell_volume [1598.5953]
_cell_formula_units_Z [2]
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  8  0.2257  0.1812  0.0000  1
  Pm  Pm1  4  0.0000  0.1595  0.0000  1
  Pm  Pm2  4  0.0000  0.3660  0.0000  1
  Pm  Pm3  4  0.2109  0.5000  0.0000  1
  Pm  Pm4  2  0.0000  0.0000  0.0000  1
  Nd  Nd5  8  0.1551  0.3995  0.5000  1
  Er  Er6  8  0.1012  0.2645  0.5000  1
  Er  Er7  8  0.1381  0.0731  0.5000  1
  Er  Er8  2  0.0000  0.5000  0.5000  1
]