data_[Sn8O4F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P4_2/nmc]
_cell_length_a [8.0411]
_cell_length_b [8.0411]
_cell_length_c [5.6457]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [137]
_chemical_formula_structural [Sn2OF2]
_chemical_formula_sum '[Sn8 O4 F8]'
_cell_volume [365.0497]
_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
[
  Sn  Sn0  8  0.0000  0.2749  0.6909  1.0
  O  O1  4  0.0000  0.5000  0.3983  1.0
  F  F2  8  0.2040  0.2040  0.0000  1.0
]