data_[Tb4Sn4Pb8Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Sn  1.9600  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 [4.2117]
_cell_length_b [18.4536]
_cell_length_c [13.5380]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [TbSnPb2Se5]
_chemical_formula_sum '[Tb4 Sn4 Pb8 Se20]'
_cell_volume [1052.1746]
_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
[
  Tb  Tb0  4  0.0000  0.2126  0.0203  1.0
  Sn  Sn1  4  0.0000  0.4571  0.4465  1.0
  Pb  Pb2  4  0.0000  0.1221  0.6634  1.0
  Pb  Pb3  4  0.0000  0.1301  0.2975  1.0
  Se  Se4  4  0.0000  0.0539  0.0748  1.0
  Se  Se5  4  0.0000  0.2807  0.6674  1.0
  Se  Se6  4  0.0000  0.3165  0.3791  1.0
  Se  Se7  4  0.0000  0.3666  0.0116  1.0
  Se  Se8  4  0.0000  0.4823  0.7634  1.0
]