data_[Na12Al2Sn4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.0058]
_cell_length_b [5.3929]
_cell_length_c [9.3539]
_cell_angle_alpha [90.0000]
_cell_angle_beta [98.0380]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na6AlSn2]
_chemical_formula_sum '[Na12 Al2 Sn4]'
_cell_volume [499.7803]
_cell_formula_units_Z [2]
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  0.0280  0.5000  0.7219  1
  Na  Na1  4  0.1725  0.0000  0.5944  1
  Na  Na2  4  0.1947  0.5000  0.0651  1
  Al  Al3  2  0.0000  0.0000  0.0000  1
  Sn  Sn4  4  0.1472  0.0000  0.2577  1
]