data_[Na4Fe2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Fe  1.8300  1.4000  0.8525
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.2958]
_cell_length_b [5.5319]
_cell_length_c [6.2964]
_cell_angle_alpha [90.0000]
_cell_angle_beta [118.1889]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Na2FeF4]
_chemical_formula_sum '[Na4 Fe2 F8]'
_cell_volume [193.2834]
_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  2  0.3586  0.2500  0.9562  1.0
  Na  Na1  2  0.3847  0.7500  0.4010  1.0
  Fe  Fe2  2  0.0040  0.7500  0.6651  1.0
  F  F3  4  0.2379  0.0013  0.6116  1.0
  F  F4  2  0.2630  0.2500  0.2459  1.0
  F  F5  2  0.2691  0.7500  0.0101  1.0
]