data_[Gd8Y4Er4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Gd  1.2000  1.8000  1.0750
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [Ama2]
_cell_length_a [5.6591]
_cell_length_b [12.5726]
_cell_length_c [7.2556]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [40]
_chemical_formula_structural [Gd2YEr]
_chemical_formula_sum '[Gd8 Y4 Er4]'
_cell_volume [516.2332]
_cell_formula_units_Z [4]
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
[
  Gd  Gd0  4  0.2500  0.1670  0.9991  1
  Gd  Gd1  4  0.2500  0.4168  0.2497  1
  Y  Y2  4  0.2500  0.4164  0.7503  1
  Er  Er3  4  0.2500  0.1668  0.5010  1
]