data_[Pm36Nd18Er3]
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 [R-3]
_cell_length_a [12.2667]
_cell_length_b [12.2667]
_cell_length_c [15.3082]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Pm12Nd6Er]
_chemical_formula_sum '[Pm36 Nd18 Er3]'
_cell_volume [1994.8473]
_cell_formula_units_Z [3]
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  18  0.0033  0.1725  0.1900  1
  Pm  Pm1  18  0.0479  0.1955  0.4164  1
  Nd  Nd2  18  0.0132  0.5905  0.6850  1
  Er  Er3  3  0.0000  0.0000  0.0000  1
]