data_[Na4Sn8Pb12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [23.6722]
_cell_length_b [3.3953]
_cell_length_c [9.4559]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.9884]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSn2Pb3]
_chemical_formula_sum '[Na4 Sn8 Pb12]'
_cell_volume [726.8469]
_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  4  0.1775  0.5000  0.0518  1
  Sn  Sn1  4  0.0611  0.0000  0.1054  1
  Sn  Sn2  4  0.1987  0.5000  0.3961  1
  Pb  Pb3  4  0.0645  0.5000  0.4232  1
  Pb  Pb4  4  0.0700  0.0000  0.7625  1
  Pb  Pb5  4  0.1949  0.5000  0.7264  1
]