data_[Rb2Si2F6]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [5.1444]
_cell_length_b [5.7521]
_cell_length_c [7.2407]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2389]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbSiF3]
_chemical_formula_sum '[Rb2 Si2 F6]'
_cell_volume [204.6332]
_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  2  0.1485  0.7500  0.7751  1
  Si  Si1  2  0.4175  0.7500  0.3425  1
  F  F2  4  0.3211  0.5338  0.1731  1
  F  F3  2  0.2485  0.2500  0.6528  1
]