data_[Na2N2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  N  3.0400  0.6500  0.6300
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [6.3858]
_cell_length_b [6.7099]
_cell_length_c [3.9473]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [NaNF4]
_chemical_formula_sum '[Na2 N2 F8]'
_cell_volume [169.1327]
_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  0.0000  0.1730  0.6672  1.0
  N  N1  2  0.0000  0.7619  0.6320  1.0
  F  F2  4  0.2055  0.2011  0.1649  1.0
  F  F3  2  0.0000  0.5615  0.7140  1.0
  F  F4  2  0.0000  0.7587  0.2851  1.0
]