data_[Na2Cr2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cr  1.6600  1.4000  0.9400
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [5.0025]
_cell_length_b [5.4319]
_cell_length_c [6.3676]
_cell_angle_alpha [76.8732]
_cell_angle_beta [74.2920]
_cell_angle_gamma [89.4742]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [NaCrF4]
_chemical_formula_sum '[Na2 Cr2 F8]'
_cell_volume [161.9607]
_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  0.1745  0.2073  0.5672  1.0
  Cr  Cr1  1  0.0000  0.5000  0.0000  1.0
  Cr  Cr2  1  0.5000  0.0000  0.0000  1.0
  F  F3  2  0.0352  0.4603  0.2922  1.0
  F  F4  2  0.2184  0.8290  0.9077  1.0
  F  F5  2  0.2781  0.9646  0.3029  1.0
  F  F6  2  0.3374  0.3197  0.8950  1.0
]