data_[Na8Sn4Pb12]
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/c]
_cell_length_a [17.1830]
_cell_length_b [6.8638]
_cell_length_c [6.0247]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.4511]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2SnPb3]
_chemical_formula_sum '[Na8 Sn4 Pb12]'
_cell_volume [710.5340]
_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  0.1653  0.3793  0.4136  1.0
  Sn  Sn1  4  0.0000  0.3660  0.7500  1.0
  Pb  Pb2  8  0.1639  0.1212  0.9028  1.0
  Pb  Pb3  4  0.0000  0.1428  0.2500  1.0
]