data_[Na6Fe3Ge3F18]
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
  Ge  2.0100  1.2500  0.7700
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.7195]
_cell_length_b [5.7195]
_cell_length_c [14.9273]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Na2FeGeF6]
_chemical_formula_sum '[Na6 Fe3 Ge3 F18]'
_cell_volume [422.8956]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.4703  1.0
  Na  Na1  3  0.0000  0.0000  0.9740  1.0
  Fe  Fe2  3  0.0000  0.0000  0.6834  1.0
  Ge  Ge3  3  0.0000  0.0000  0.1869  1.0
  F  F4  9  0.0496  0.3405  0.7538  1.0
  F  F5  9  0.0634  0.6917  0.2609  1.0
]