data_[Na8Pb20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [20.3950]
_cell_length_b [6.0812]
_cell_length_c [6.8992]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.0404]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2Pb5]
_chemical_formula_sum '[Na8 Pb20]'
_cell_volume [855.5510]
_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
[
  Na  Na0  8  0.0727  0.4050  0.3923  1
  Pb  Pb1  8  0.1445  0.0879  0.0396  1
  Pb  Pb2  8  0.2148  0.4079  0.6759  1
  Pb  Pb3  4  0.0000  0.0909  0.7500  1
]