data_[Nd1Y1Er1Cu1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.5171]
_cell_length_b [3.5171]
_cell_length_c [8.6760]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [NdYErCu]
_chemical_formula_sum '[Nd1 Y1 Er1 Cu1]'
_cell_volume [107.3215]
_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
[
  Nd  Nd0  1  0.0000  0.0000  0.0752  1.0
  Y  Y1  1  0.5000  0.5000  0.7674  1.0
  Er  Er2  1  0.5000  0.5000  0.3774  1.0
  Cu  Cu3  1  0.0000  0.0000  0.5647  1.0
]