data_[Rb4Si2H4F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [10.1412]
_cell_length_b [5.8484]
_cell_length_c [4.8063]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.0414]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2SiH2F4]
_chemical_formula_sum '[Rb4 Si2 H4 F8]'
_cell_volume [284.6596]
_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
[
  Rb  Rb0  4  0.1565  0.5000  0.2110  1.0
  Si  Si1  2  0.0000  0.0000  0.5000  1.0
  H  H2  4  0.1089  0.0000  0.2951  1.0
  F  F3  8  0.0865  0.2178  0.6973  1.0
]