data_[Pm6Nd4Er8]
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 [C2/m]
_cell_length_a [11.3118]
_cell_length_b [5.0892]
_cell_length_c [10.7786]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.1118]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm3(NdEr2)2]
_chemical_formula_sum '[Pm6 Nd4 Er8]'
_cell_volume [589.7503]
_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  4  0.1669  0.5000  0.5574  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Nd  Nd2  4  0.1658  0.5000  0.2201  1
  Er  Er3  4  0.0001  0.0000  0.3341  1
  Er  Er4  4  0.1662  0.5000  0.8886  1
]