data_[Na4Al2F12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Al  1.6100  1.2500  0.6750
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.5958]
_cell_length_b [5.9083]
_cell_length_c [9.0061]
_cell_angle_alpha [90.0000]
_cell_angle_beta [120.9876]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Na2AlF6]
_chemical_formula_sum '[Na4 Al2 F12]'
_cell_volume [255.2590]
_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  0.1920  0.0792  0.7347  1.0
  Al  Al1  2  0.5000  0.0000  0.5000  1.0
  F  F2  4  0.1898  0.1615  0.4511  1.0
  F  F3  4  0.2773  0.7484  0.9037  1.0
  F  F4  4  0.4491  0.0816  0.2917  1.0
]