data_[Ge4Sb4Pb8Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ge  2.0100  1.2500  0.7700
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.3951]
_cell_length_b [18.3044]
_cell_length_c [12.6573]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [GeSbPb2Se5]
_chemical_formula_sum '[Ge4 Sb4 Pb8 Se20]'
_cell_volume [1018.2733]
_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
[
  Ge  Ge0  4  0.0000  0.4501  0.4237  1
  Sb  Sb1  4  0.0000  0.2028  0.0368  1
  Pb  Pb2  4  0.0000  0.1083  0.3422  1
  Pb  Pb3  4  0.0000  0.1323  0.6910  1
  Se  Se4  4  0.0000  0.0206  0.0076  1
  Se  Se5  4  0.0000  0.2937  0.6797  1
  Se  Se6  4  0.0000  0.3210  0.3678  1
  Se  Se7  4  0.0000  0.3474  0.0198  1
  Se  Se8  4  0.0000  0.4881  0.7553  1
]