data_[Cu8Si4Ge4Te16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
  Ge  2.0100  1.2500  0.7700
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [Fmm2]
_cell_length_a [8.4959]
_cell_length_b [9.3589]
_cell_length_c [11.4388]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [42]
_chemical_formula_structural [Cu2SiGeTe4]
_chemical_formula_sum '[Cu8 Si4 Ge4 Te16]'
_cell_volume [909.5164]
_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  8  0.2500  0.2500  0.2463  1.0
  Si  Si1  4  0.0000  0.0000  0.4968  1.0
  Ge  Ge2  4  0.0000  0.0000  0.9853  1.0
  Te  Te3  8  0.0000  0.2232  0.3719  1.0
  Te  Te4  8  0.2349  0.0000  0.6406  1.0
]