data_[Pm4Nd15Er1]
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 [P4/mmm]
_cell_length_a [5.1901]
_cell_length_b [5.1901]
_cell_length_c [25.8830]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Pm4Nd15Er]
_chemical_formula_sum '[Pm4 Nd15 Er1]'
_cell_volume [697.2220]
_cell_formula_units_Z [1]
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  2  0.0000  0.0000  0.1988  1
  Pm  Pm1  2  0.0000  0.0000  0.3996  1
  Nd  Nd2  4  0.0000  0.5000  0.0985  1
  Nd  Nd3  4  0.0000  0.5000  0.2992  1
  Nd  Nd4  2  0.0000  0.5000  0.5000  1
  Nd  Nd5  2  0.5000  0.5000  0.1986  1
  Nd  Nd6  2  0.5000  0.5000  0.3997  1
  Nd  Nd7  1  0.5000  0.5000  0.0000  1
  Er  Er8  1  0.0000  0.0000  0.0000  1
]