data_[Cu20Ge8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.7353]
_cell_length_b [27.7962]
_cell_length_c [3.6977]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Cu5Ge2]
_chemical_formula_sum '[Cu20 Ge8]'
_cell_volume [383.9275]
_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
[
  Cu  Cu0  4  0.0000  0.0322  0.7500  1
  Cu  Cu1  4  0.0000  0.1855  0.2500  1
  Cu  Cu2  4  0.0000  0.2499  0.7500  1
  Cu  Cu3  4  0.0000  0.4030  0.2500  1
  Cu  Cu4  4  0.0000  0.4679  0.7500  1
  Ge  Ge5  4  0.0000  0.0971  0.2500  1
  Ge  Ge6  4  0.0000  0.3154  0.2500  1
]