data_[Na4Ag8Sn12]
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 [C2/m]
_cell_length_a [16.1875]
_cell_length_b [4.6229]
_cell_length_c [8.5883]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.3147]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaAg2Sn3]
_chemical_formula_sum '[Na4 Ag8 Sn12]'
_cell_volume [598.7258]
_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  0.1123  0.0000  0.1764  1
  Ag  Ag1  4  0.0328  0.5000  0.8646  1
  Ag  Ag2  4  0.2291  0.0000  0.5834  1
  Sn  Sn3  4  0.0750  0.0000  0.6952  1
  Sn  Sn4  4  0.1032  0.5000  0.4639  1
  Sn  Sn5  4  0.2166  0.5000  0.0608  1
]