The structure described by Rb3NaNb2O3F10 crystallizes in the monoclinic C2 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 12-coordinate geometry to one O(2), one O(3), one F(10), one F(4), one F(5), one F(9), two equivalent F(1), two equivalent F(6), and two equivalent F(7) atoms. In the second Rb site, Rb(2) is bonded to one F(1), one F(2), one F(3), one F(6), one F(7), one F(8), two equivalent F(4), two equivalent F(5), and two equivalent F(9) atoms to form RbF12 cuboctahedra that share corners with two equivalent Rb(2)F12 cuboctahedra,  an edgeedge with one Na(2)O2F4 octahedra,  a faceface with one Rb(2)F12 cuboctahedra, faces with two equivalent Na(1)F6 octahedra, faces with two equivalent Nb(1)OF5 octahedra, and faces with two equivalent Nb(2)OF5 octahedra. In the third Rb site, Rb(3) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), one F(2), one F(3), two equivalent F(10), and two equivalent F(8) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent F(4), two equivalent F(5), and two equivalent F(9) atoms to form NaF6 octahedra that share corners with two equivalent Nb(1)OF5 octahedra, corners with four equivalent Nb(2)OF5 octahedra, and faces with four equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-8°. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent F(2), and two equivalent F(3) atoms to form NaO2F4 octahedra that share corners with four equivalent Nb(1)OF5 octahedra and edges with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one F(2), one F(3), one F(6), one F(7), and one F(9) atom to form distorted NbOF5 octahedra that share  a cornercorner with one Na(1)F6 octahedra, corners with two equivalent Na(2)O2F4 octahedra, and faces with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the second Nb site, Nb(2) is bonded to one O(3), one F(1), one F(10), one F(4), one F(5), and one F(8) atom to form NbOF5 octahedra that share corners with two equivalent Na(1)F6 octahedra and faces with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-8°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Rb(3) and one Nb(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and one Na(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Rb(1), two equivalent Rb(3), and one Nb(2) atom. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(2) atom. In the second F site, F(2) is bonded in a 2-coordinate geometry to one Rb(2), one Rb(3), one Na(2), and one Nb(1) atom. In the third F site, F(3) is bonded in a 2-coordinate geometry to one Rb(2), one Rb(3), one Na(2), and one Nb(1) atom. In the fourth F site, F(4) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(2) atom. In the fifth F site, F(5) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(2) atom. In the sixth F site, F(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(1) atom. In the seventh F site, F(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(1) atom. In the eighth F site, F(8) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one Nb(2) atom. In the ninth F site, F(9) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(1) atom. In the tenth F site, F(10) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(3), and one Nb(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3NaNb2O3F10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.113
_cell_length_b   11.119
_cell_length_c   11.566
_cell_angle_alpha   74.725
_cell_angle_beta   74.676
_cell_angle_gamma   105.955
_symmetry_Int_Tables_number   1
_cell_volume   679.455
_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  1  0.889  0.670  0.882  1.0
  Rb  Rb1  1  0.101  0.330  0.118  1.0
  Rb  Rb2  1  0.338  0.791  0.124  1.0
  Rb  Rb3  1  0.671  0.209  0.876  1.0
  Rb  Rb4  1  0.266  0.141  0.593  1.0
  Rb  Rb5  1  0.719  0.859  0.407  1.0
  Na  Na6  1  0.988  0.000  0.000  1.0
  Na  Na7  1  0.001  0.500  0.500  1.0
  Nb  Nb8  1  0.649  0.559  0.263  1.0
  Nb  Nb9  1  0.353  0.441  0.737  1.0
  Nb  Nb10  1  0.561  0.911  0.749  1.0
  Nb  Nb11  1  0.399  0.089  0.251  1.0
  O  O12  1  0.513  0.389  0.369  1.0
  O  O13  1  0.493  0.611  0.631  1.0
  O  O14  1  0.983  0.342  0.382  1.0
  O  O15  1  0.022  0.658  0.618  1.0
  O  O16  1  0.382  0.881  0.654  1.0
  O  O17  1  0.155  0.119  0.346  1.0
  F  F18  1  0.423  0.728  0.881  1.0
  F  F19  1  0.576  0.272  0.119  1.0
  F  F20  1  0.401  0.621  0.354  1.0
  F  F21  1  0.868  0.622  0.354  1.0
  F  F22  1  0.600  0.378  0.646  1.0
  F  F23  1  0.134  0.379  0.646  1.0
  F  F24  1  0.767  0.952  0.872  1.0
  F  F25  1  0.314  0.953  0.873  1.0
  F  F26  1  0.235  0.047  0.127  1.0
  F  F27  1  0.687  0.048  0.128  1.0
  F  F28  1  0.477  0.548  0.140  1.0
  F  F29  1  0.932  0.549  0.139  1.0
  F  F30  1  0.522  0.451  0.861  1.0
  F  F31  1  0.069  0.452  0.860  1.0
  F  F32  1  0.724  0.108  0.658  1.0
  F  F33  1  0.274  0.892  0.342  1.0
  F  F34  1  0.818  0.772  0.141  1.0
  F  F35  1  0.187  0.228  0.859  1.0
  F  F36  1  0.847  0.883  0.653  1.0
  F  F37  1  0.618  0.117  0.347  1.0
[/CIF]
.
The structure described by Rb3NaNb2O3F10 crystallizes in the monoclinic C2 space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 12-coordinate geometry to one O(2), one O(3), one F(10), one F(4), one F(5), one F(9), two equivalent F(1), two equivalent F(6), and two equivalent F(7) atoms. In the second Rb site, Rb(2) is bonded to one F(1), one F(2), one F(3), one F(6), one F(7), one F(8), two equivalent F(4), two equivalent F(5), and two equivalent F(9) atoms to form RbF12 cuboctahedra that share corners with two equivalent Rb(2)F12 cuboctahedra,  an edgeedge with one Na(2)O2F4 octahedra,  a faceface with one Rb(2)F12 cuboctahedra, faces with two equivalent Na(1)F6 octahedra, faces with two equivalent Nb(1)OF5 octahedra, and faces with two equivalent Nb(2)OF5 octahedra. In the third Rb site, Rb(3) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), one F(2), one F(3), two equivalent F(10), and two equivalent F(8) atoms. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent F(4), two equivalent F(5), and two equivalent F(9) atoms to form NaF6 octahedra that share corners with two equivalent Nb(1)OF5 octahedra, corners with four equivalent Nb(2)OF5 octahedra, and faces with four equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-8°. In the second Na site, Na(2) is bonded to two equivalent O(2), two equivalent F(2), and two equivalent F(3) atoms to form NaO2F4 octahedra that share corners with four equivalent Nb(1)OF5 octahedra and edges with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one F(2), one F(3), one F(6), one F(7), and one F(9) atom to form distorted NbOF5 octahedra that share  a cornercorner with one Na(1)F6 octahedra, corners with two equivalent Na(2)O2F4 octahedra, and faces with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-50°. In the second Nb site, Nb(2) is bonded to one O(3), one F(1), one F(10), one F(4), one F(5), and one F(8) atom to form NbOF5 octahedra that share corners with two equivalent Na(1)F6 octahedra and faces with two equivalent Rb(2)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-8°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Rb(3) and one Nb(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and one Na(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Rb(1), two equivalent Rb(3), and one Nb(2) atom. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(2) atom. In the second F site, F(2) is bonded in a 2-coordinate geometry to one Rb(2), one Rb(3), one Na(2), and one Nb(1) atom. In the third F site, F(3) is bonded in a 2-coordinate geometry to one Rb(2), one Rb(3), one Na(2), and one Nb(1) atom. In the fourth F site, F(4) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(2) atom. In the fifth F site, F(5) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(2) atom. In the sixth F site, F(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(1) atom. In the seventh F site, F(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Nb(1) atom. In the eighth F site, F(8) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(3), and one Nb(2) atom. In the ninth F site, F(9) is bonded in a distorted linear geometry to one Rb(1), two equivalent Rb(2), one Na(1), and one Nb(1) atom. In the tenth F site, F(10) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(3), and one Nb(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3NaNb2O3F10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.113
_cell_length_b   11.119
_cell_length_c   11.566
_cell_angle_alpha   74.725
_cell_angle_beta   74.676
_cell_angle_gamma   105.955
_symmetry_Int_Tables_number   1
_cell_volume   679.455
_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  1  0.889  0.670  0.882  1.0
  Rb  Rb1  1  0.101  0.330  0.118  1.0
  Rb  Rb2  1  0.338  0.791  0.124  1.0
  Rb  Rb3  1  0.671  0.209  0.876  1.0
  Rb  Rb4  1  0.266  0.141  0.593  1.0
  Rb  Rb5  1  0.719  0.859  0.407  1.0
  Na  Na6  1  0.988  0.000  0.000  1.0
  Na  Na7  1  0.001  0.500  0.500  1.0
  Nb  Nb8  1  0.649  0.559  0.263  1.0
  Nb  Nb9  1  0.353  0.441  0.737  1.0
  Nb  Nb10  1  0.561  0.911  0.749  1.0
  Nb  Nb11  1  0.399  0.089  0.251  1.0
  O  O12  1  0.513  0.389  0.369  1.0
  O  O13  1  0.493  0.611  0.631  1.0
  O  O14  1  0.983  0.342  0.382  1.0
  O  O15  1  0.022  0.658  0.618  1.0
  O  O16  1  0.382  0.881  0.654  1.0
  O  O17  1  0.155  0.119  0.346  1.0
  F  F18  1  0.423  0.728  0.881  1.0
  F  F19  1  0.576  0.272  0.119  1.0
  F  F20  1  0.401  0.621  0.354  1.0
  F  F21  1  0.868  0.622  0.354  1.0
  F  F22  1  0.600  0.378  0.646  1.0
  F  F23  1  0.134  0.379  0.646  1.0
  F  F24  1  0.767  0.952  0.872  1.0
  F  F25  1  0.314  0.953  0.873  1.0
  F  F26  1  0.235  0.047  0.127  1.0
  F  F27  1  0.687  0.048  0.128  1.0
  F  F28  1  0.477  0.548  0.140  1.0
  F  F29  1  0.932  0.549  0.139  1.0
  F  F30  1  0.522  0.451  0.861  1.0
  F  F31  1  0.069  0.452  0.860  1.0
  F  F32  1  0.724  0.108  0.658  1.0
  F  F33  1  0.274  0.892  0.342  1.0
  F  F34  1  0.818  0.772  0.141  1.0
  F  F35  1  0.187  0.228  0.859  1.0
  F  F36  1  0.847  0.883  0.653  1.0
  F  F37  1  0.618  0.117  0.347  1.0
[/CIF]
.