data_[Na4Zn12Sn8]
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 [16.8415]
_cell_length_b [4.2395]
_cell_length_c [8.6280]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.1939]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaZn3Sn2]
_chemical_formula_sum '[Na4 Zn12 Sn8]'
_cell_volume [561.9312]
_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  0.1414  0.0000  0.0229  1.0
  Zn  Zn1  4  0.0445  0.0000  0.4046  1.0
  Zn  Zn2  4  0.0828  0.5000  0.6400  1.0
  Zn  Zn3  4  0.1919  0.5000  0.4705  1.0
  Sn  Sn4  4  0.0270  0.5000  0.1887  1.0
  Sn  Sn5  4  0.2083  0.0000  0.7168  1.0
]