data_Rb2NaBiF6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.26
_cell_length_b   6.26
_cell_length_c   6.26
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb2NaBiF6
_chemical_formula_sum   'Rb2 Na1 Bi1 F6'
_cell_volume   173.75
_cell_formula_units_Z   1
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  Rb8  1  0.64  0.64  0.64  1.0
  Rb  Rb9  1  0.21  0.21  0.21  1.0
  Na  Na7  1  0.0  0.0  0.0  1.0
  Bi  Bi0  1  0.43  0.43  0.43  1.0
  F  F1  1  0.67  0.43  0.43  1.0
  F  F2  1  0.43  0.67  0.43  1.0
  F  F3  1  0.43  0.43  0.19  1.0
  F  F4  1  0.43  0.19  0.43  1.0
  F  F5  1  0.19  0.43  0.43  1.0
  F  F6  1  0.43  0.43  0.67  1.0

data_Rb2NaBiF6
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.26
_cell_length_b   6.26
_cell_length_c   15.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Rb2NaBiF6
_chemical_formula_sum   'Rb6 Na3 Bi3 F18'
_cell_volume   521.25
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.36  1.0
  Rb  Rb1  3  0.0  0.0  0.79  1.0
  Na  Na2  3  0.0  0.0  0.0  1.0
  Bi  Bi3  3  0.0  0.0  0.57  1.0
  F  F4  9  0.08  0.16  0.49  1.0
  F  F5  9  0.16  0.08  0.65  1.0

Rb Rb Na Bi F F F F F F
Rb Rb Na Bi F F F F F F 0 9 o o o 0 4 o o o 0 5 o o o 0 2 + + o 0 2 + o + 0 2 o + + 1 7 o o o 1 8 o o o 1 6 o o o 1 2 o + o 1 2 + o o 1 2 o o + 1 2 o o o 2 5 - - o 2 5 o - - 2 5 o - o 2 4 - - o 2 4 - o - 2 4 - o o 2 8 o - o 2 8 o o - 2 9 - o - 2 9 o - - 2 9 o o - 2 7 - o o 2 7 o o - 2 6 - o o 2 6 o - o 2 3 - o o 2 3 o - o 2 3 o o - 3 7 o o o 3 8 o o o 3 6 o o o 3 9 o o o 3 5 o o o 3 4 o o o 4 9 o o o 4 5 o o o 5 9 o o o 6 7 o o o 6 8 o o o 7 8 o o o 
Rb2NaBiF6 crystallizes in the trigonal R3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to three equivalent F(1) and three equivalent F(2) atoms. All Rb(1)-F(1) bond lengths are 2.24 Å. All Rb(1)-F(2) bond lengths are 2.81 Å. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one Na(1), three equivalent F(1), and three equivalent F(2) atoms. The Rb(2)-Na(1) bond length is 3.29 Å. All Rb(2)-F(1) bond lengths are 2.81 Å. All Rb(2)-F(2) bond lengths are 2.24 Å. Na(1) is bonded in a 1-coordinate geometry to one Rb(2) atom. Bi(1) is bonded in a hexagonal planar geometry to three equivalent F(1) and three equivalent F(2) atoms. All Bi(1)-F(1) bond lengths are 1.51 Å. All Bi(1)-F(2) bond lengths are 1.51 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), and one Bi(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), and one Bi(1) atom.