data_[Pm3Dy18Er9]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Dy  1.2200  1.7500  1.1310
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [9.7612]
_cell_length_b [9.7612]
_cell_length_c [11.7381]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Pm(Dy2Er)3]
_chemical_formula_sum '[Pm3 Dy18 Er9]'
_cell_volume [968.5717]
_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  3  0.0000  0.0000  0.8980  1
  Dy  Dy1  9  0.0033  0.3352  0.9032  1
  Dy  Dy2  9  0.0035  0.6700  0.4038  1
  Er  Er3  3  0.0000  0.0000  0.1453  1
  Er  Er4  3  0.0000  0.0000  0.3955  1
  Er  Er5  3  0.0000  0.0000  0.6400  1
]