data_[Gd4Al2Cu4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Gd  1.2000  1.8000  1.0750
  Al  1.6100  1.2500  0.6750
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.2162]
_cell_length_b [5.6076]
_cell_length_c [8.6196]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Gd2AlCu2]
_chemical_formula_sum '[Gd4 Al2 Cu4]'
_cell_volume [203.7902]
_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
[
  Gd  Gd0  4  0.0000  0.5000  0.2004  1
  Al  Al1  2  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.0000  0.2322  0.5000  1
]