data_[K4Si2H4F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Si  1.9000  1.1000  0.5400
  H  2.2000  0.2500  0.0000
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.6893]
_cell_length_b [5.6575]
_cell_length_c [4.6089]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.5123]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2SiH2F4]
_chemical_formula_sum '[K4 Si2 H4 F8]'
_cell_volume [252.1745]
_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
[
  K  K0  4  0.1556  0.5000  0.2141  1
  Si  Si1  2  0.0000  0.0000  0.5000  1
  H  H2  4  0.1131  0.0000  0.2877  1
  F  F3  8  0.0913  0.2255  0.7057  1
]