data_[Na4Si4F20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [8.6585]
_cell_length_b [6.4274]
_cell_length_c [7.2724]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.7361]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaSiF5]
_chemical_formula_sum '[Na4 Si4 F20]'
_cell_volume [367.5861]
_cell_formula_units_Z [4]
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  0.0000  0.4878  0.2500  1.0
  Si  Si1  4  0.0000  0.0000  0.0000  1.0
  F  F2  8  0.0061  0.2630  0.9892  1.0
  F  F3  8  0.2117  0.0078  0.6059  1.0
  F  F4  4  0.0000  0.0221  0.2500  1.0
]