data_[Na8Zn4Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Zn  1.6500  1.3500  0.8800
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.4018]
_cell_length_b [4.5730]
_cell_length_c [11.4738]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.2468]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2ZnSn2]
_chemical_formula_sum '[Na8 Zn4 Sn8]'
_cell_volume [531.8740]
_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  0.0108  0.0000  0.6802  1.0
  Na  Na1  4  0.1905  0.0000  0.1128  1.0
  Zn  Zn2  4  0.2061  0.5000  0.3363  1.0
  Sn  Sn3  4  0.0269  0.5000  0.8893  1.0
  Sn  Sn4  4  0.1503  0.5000  0.5559  1.0
]