data_RbF2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.28
_cell_length_b   6.28
_cell_length_c   4.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbF2
_chemical_formula_sum   'Rb2 F4'
_cell_volume   173.52
_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  Rb4  1  0.0  0.0  0.0  1.0
  Rb  Rb5  1  0.14  0.14  0.2  1.0
  F  F0  1  0.93  0.93  0.0  1.0
  F  F1  1  0.35  0.35  0.0  1.0
  F  F2  1  0.07  0.21  0.2  1.0
  F  F3  1  0.21  0.07  0.2  1.0

data_RbF2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   8.88
_cell_length_b   8.88
_cell_length_c   4.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   RbF2
_chemical_formula_sum   'Rb4 F8'
_cell_volume   347.04
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.0  1.0
  Rb  Rb1  2  0.14  0.0  0.2  1.0
  F  F2  4  0.14  0.07  0.2  1.0
  F  F3  2  0.35  0.0  -0.0  1.0
  F  F4  2  0.43  0.5  -0.0  1.0

Rb Rb F F F F
RbFRbF3 is Cyanogen Chloride-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two rubidium fluoride molecules and two RbF3 clusters. In each RbF3 cluster, Rb(2) is bonded in a linear geometry to one F(2) and two equivalent F(3) atoms. The Rb(2)-F(2) bond length is 2.06 Å. Both Rb(2)-F(3) bond lengths are 0.63 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded in a single-bond geometry to one Rb(2) atom. In the second F site, F(3) is bonded in a single-bond geometry to one Rb(2) atom.