data_[Na4Cr2F8]
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 [P2_1/c]
_cell_length_a [3.3959]
_cell_length_b [9.6554]
_cell_length_c [5.7239]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.5937]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2CrF4]
_chemical_formula_sum '[Na4 Cr2 F8]'
_cell_volume [187.4882]
_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  4  0.4891  0.6809  0.0739  1.0
  Cr  Cr1  2  0.0000  0.0000  0.0000  1.0
  F  F2  4  0.0043  0.1943  0.1338  1.0
  F  F3  4  0.4432  0.5465  0.7400  1.0
]