data_[Na8Ag12Sn20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [12.7824]
_cell_length_b [12.9137]
_cell_length_c [6.3893]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Na2Ag3Sn5]
_chemical_formula_sum '[Na8 Ag12 Sn20]'
_cell_volume [1054.6670]
_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  0.1348  0.2632  0.0000  1.0
  Ag  Ag1  8  0.1321  0.3613  0.5000  1.0
  Ag  Ag2  4  0.0000  0.0000  0.2500  1.0
  Sn  Sn3  8  0.1072  0.1508  0.5000  1.0
  Sn  Sn4  8  0.2410  0.0000  0.2500  1.0
  Sn  Sn5  4  0.0000  0.5000  0.2500  1.0
]