data_[Na12Ag8Sn12]
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 [Cmcm]
_cell_length_a [4.8510]
_cell_length_b [11.0584]
_cell_length_c [15.5830]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Na3Ag2Sn3]
_chemical_formula_sum '[Na12 Ag8 Sn12]'
_cell_volume [835.9460]
_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  0.0000  0.0747  0.6115  1.0
  Na  Na1  4  0.0000  0.3354  0.7500  1.0
  Ag  Ag2  8  0.0000  0.2201  0.1044  1.0
  Sn  Sn3  8  0.0000  0.3830  0.5453  1.0
  Sn  Sn4  4  0.0000  0.3754  0.2500  1.0
]