data_[Na4Sn8F20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Pbcn]
_cell_length_a [7.9672]
_cell_length_b [11.5334]
_cell_length_c [6.6696]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [60]
_chemical_formula_structural [NaSn2F5]
_chemical_formula_sum '[Na4 Sn8 F20]'
_cell_volume [612.8623]
_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  0.0000  0.0537  0.2500  1
  Sn  Sn1  8  0.1175  0.3433  0.9936  1
  F  F2  8  0.1621  0.0644  0.5481  1
  F  F3  8  0.1886  0.2194  0.2174  1
  F  F4  4  0.0000  0.4466  0.2500  1
]