The material structure described by Rb2Nb2P2S11 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one S(13), one S(17), one S(18), one S(20), one S(3), two equivalent S(5), and two equivalent S(8) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one S(10), one S(13), one S(17), one S(18), one S(3), two equivalent S(5), and two equivalent S(8) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one S(19), one S(22), one S(7), one S(9), two equivalent S(15), and two equivalent S(2) atoms. In the fourth Rb site, Rb(4) is bonded to one S(12), one S(16), one S(21), one S(6), two equivalent S(15), and two equivalent S(2) atoms to form distorted RbS8 hexagonal bipyramids that share corners with four equivalent Rb(4)S8 hexagonal bipyramids,  a cornercorner with one P(4)S4 tetrahedra,  an edgeedge with one P(4)S4 tetrahedra, and edges with two equivalent P(2)S4 tetrahedra. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 7-coordinate geometry to one S(1), one S(11), one S(12), one S(17), one S(20), one S(6), and one S(9) atom. In the second Nb site, Nb(2) is bonded in a 7-coordinate geometry to one S(10), one S(14), one S(21), one S(22), one S(3), one S(4), and one S(7) atom. In the third Nb site, Nb(3) is bonded in a 7-coordinate geometry to one S(10), one S(13), one S(14), one S(19), one S(21), one S(4), and one S(7) atom. In the fourth Nb site, Nb(4) is bonded in a 7-coordinate geometry to one S(1), one S(11), one S(16), one S(18), one S(20), one S(6), and one S(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one S(17), one S(18), one S(20), and one S(8) atom. In the second P site, P(2) is bonded to one S(12), one S(15), one S(16), and one S(9) atom to form PS4 tetrahedra that share edges with two equivalent Rb(4)S8 hexagonal bipyramids. In the third P site, P(3) is bonded in a tetrahedral geometry to one S(10), one S(13), one S(3), and one S(5) atom. In the fourth P site, P(4) is bonded to one S(19), one S(2), one S(21), and one S(22) atom to form PS4 tetrahedra that share  a cornercorner with one Rb(4)S8 hexagonal bipyramid and  an edgeedge with one Rb(4)S8 hexagonal bipyramid. There are twenty-two inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(4), and one S(6) atom. In the second S site, S(2) is bonded to two equivalent Rb(3), two equivalent Rb(4), and one P(4) atom to form distorted SRb4P square pyramids that share corners with four equivalent S(2)Rb4P square pyramids,  a cornercorner with one S(21)RbNb2P trigonal pyramid, corners with two equivalent S(9)RbNb2P trigonal pyramids, edges with four equivalent S(15)Rb4P square pyramids, and  an edgeedge with one S(21)RbNb2P trigonal pyramid. In the third S site, S(3) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(2), and one P(3) atom. In the fourth S site, S(4) is bonded in a 2-coordinate geometry to one Nb(2) and one Nb(3) atom. In the fifth S site, S(5) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one P(3) atom. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Rb(4), one Nb(1), one Nb(4), and one S(1) atom. In the seventh S site, S(7) is bonded in a 4-coordinate geometry to one Rb(3), one Nb(2), one Nb(3), and one S(14) atom. In the eighth S site, S(8) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one P(1) atom. In the ninth S site, S(9) is bonded to one Rb(3), one Nb(1), one Nb(4), and one P(2) atom to form a mixture of distorted corner and edge-sharing SRbNb2P trigonal pyramids. In the tenth S site, S(10) is bonded in a 4-coordinate geometry to one Rb(2), one Nb(2), one Nb(3), and one P(3) atom. In the eleventh S site, S(11) is bonded in a distorted L-shaped geometry to one Nb(1) and one Nb(4) atom. In the twelfth S site, S(12) is bonded in a distorted L-shaped geometry to one Rb(4), one Nb(1), and one P(2) atom. In the thirteenth S site, S(13) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(3), and one P(3) atom. In the fourteenth S site, S(14) is bonded in a 3-coordinate geometry to one Nb(2), one Nb(3), and one S(7) atom. In the fifteenth S site, S(15) is bonded to two equivalent Rb(3), two equivalent Rb(4), and one P(2) atom to form distorted SRb4P square pyramids that share corners with four equivalent S(15)Rb4P square pyramids,  a cornercorner with one S(9)RbNb2P trigonal pyramid, corners with two equivalent S(21)RbNb2P trigonal pyramids, edges with four equivalent S(2)Rb4P square pyramids, and  an edgeedge with one S(9)RbNb2P trigonal pyramid. In the sixteenth S site, S(16) is bonded in a distorted L-shaped geometry to one Rb(4), one Nb(4), and one P(2) atom. In the seventeenth S site, S(17) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(1), and one P(1) atom. In the eighteenth S site, S(18) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(4), and one P(1) atom. In the nineteenth S site, S(19) is bonded in a distorted L-shaped geometry to one Rb(3), one Nb(3), and one P(4) atom. In the twentieth S site, S(20) is bonded in a 4-coordinate geometry to one Rb(1), one Nb(1), one Nb(4), and one P(1) atom. In the twenty-first S site, S(21) is bonded to one Rb(4), one Nb(2), one Nb(3), and one P(4) atom to form a mixture of distorted corner and edge-sharing SRbNb2P trigonal pyramids. In the twenty-second S site, S(22) is bonded in a distorted L-shaped geometry to one Rb(3), one Nb(2), and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Nb2P2S11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.148
_cell_length_b   7.135
_cell_length_c   18.884
_cell_angle_alpha   81.406
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.223
_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  0.752  0.742  0.996  1.0
  Rb  Rb1  1  0.243  0.253  0.003  1.0
  Rb  Rb2  1  0.752  0.779  0.507  1.0
  Rb  Rb3  1  0.252  0.229  0.495  1.0
  Nb  Nb4  1  0.049  0.296  0.755  1.0
  Nb  Nb5  1  0.552  0.698  0.247  1.0
  Nb  Nb6  1  0.947  0.692  0.244  1.0
  Nb  Nb7  1  0.455  0.308  0.754  1.0
  P  P8  1  0.749  0.310  0.890  1.0
  P  P9  1  0.755  0.210  0.628  1.0
  P  P10  1  0.253  0.686  0.105  1.0
  P  P11  1  0.257  0.792  0.373  1.0
  S  S12  1  0.255  0.599  0.731  1.0
  S  S13  1  0.253  0.737  0.479  1.0
  S  S14  1  0.479  0.526  0.144  1.0
  S  S15  1  0.755  0.939  0.188  1.0
  S  S16  1  0.245  0.765  0.003  1.0
  S  S17  1  0.252  0.438  0.651  1.0
  S  S18  1  0.750  0.554  0.346  1.0
  S  S19  1  0.748  0.223  0.998  1.0
  S  S20  1  0.750  0.457  0.673  1.0
  S  S21  1  0.250  0.885  0.176  1.0
  S  S22  1  0.252  0.065  0.810  1.0
  S  S23  1  0.990  0.062  0.668  1.0
  S  S24  1  0.018  0.514  0.143  1.0
  S  S25  1  0.752  0.395  0.266  1.0
  S  S26  1  0.756  0.265  0.520  1.0
  S  S27  1  0.512  0.060  0.665  1.0
  S  S28  1  0.980  0.474  0.857  1.0
  S  S29  1  0.521  0.474  0.859  1.0
  S  S30  1  0.012  0.943  0.332  1.0
  S  S31  1  0.752  0.114  0.826  1.0
  S  S32  1  0.245  0.550  0.323  1.0
  S  S33  1  0.477  0.941  0.334  1.0
[/CIF]
.
The material structure described by Rb2Nb2P2S11 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one S(13), one S(17), one S(18), one S(20), one S(3), two equivalent S(5), and two equivalent S(8) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one S(10), one S(13), one S(17), one S(18), one S(3), two equivalent S(5), and two equivalent S(8) atoms. In the third Rb site, Rb(3) is bonded in a 8-coordinate geometry to one S(19), one S(22), one S(7), one S(9), two equivalent S(15), and two equivalent S(2) atoms. In the fourth Rb site, Rb(4) is bonded to one S(12), one S(16), one S(21), one S(6), two equivalent S(15), and two equivalent S(2) atoms to form distorted RbS8 hexagonal bipyramids that share corners with four equivalent Rb(4)S8 hexagonal bipyramids,  a cornercorner with one P(4)S4 tetrahedra,  an edgeedge with one P(4)S4 tetrahedra, and edges with two equivalent P(2)S4 tetrahedra. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a 7-coordinate geometry to one S(1), one S(11), one S(12), one S(17), one S(20), one S(6), and one S(9) atom. In the second Nb site, Nb(2) is bonded in a 7-coordinate geometry to one S(10), one S(14), one S(21), one S(22), one S(3), one S(4), and one S(7) atom. In the third Nb site, Nb(3) is bonded in a 7-coordinate geometry to one S(10), one S(13), one S(14), one S(19), one S(21), one S(4), and one S(7) atom. In the fourth Nb site, Nb(4) is bonded in a 7-coordinate geometry to one S(1), one S(11), one S(16), one S(18), one S(20), one S(6), and one S(9) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one S(17), one S(18), one S(20), and one S(8) atom. In the second P site, P(2) is bonded to one S(12), one S(15), one S(16), and one S(9) atom to form PS4 tetrahedra that share edges with two equivalent Rb(4)S8 hexagonal bipyramids. In the third P site, P(3) is bonded in a tetrahedral geometry to one S(10), one S(13), one S(3), and one S(5) atom. In the fourth P site, P(4) is bonded to one S(19), one S(2), one S(21), and one S(22) atom to form PS4 tetrahedra that share  a cornercorner with one Rb(4)S8 hexagonal bipyramid and  an edgeedge with one Rb(4)S8 hexagonal bipyramid. There are twenty-two inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(4), and one S(6) atom. In the second S site, S(2) is bonded to two equivalent Rb(3), two equivalent Rb(4), and one P(4) atom to form distorted SRb4P square pyramids that share corners with four equivalent S(2)Rb4P square pyramids,  a cornercorner with one S(21)RbNb2P trigonal pyramid, corners with two equivalent S(9)RbNb2P trigonal pyramids, edges with four equivalent S(15)Rb4P square pyramids, and  an edgeedge with one S(21)RbNb2P trigonal pyramid. In the third S site, S(3) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(2), and one P(3) atom. In the fourth S site, S(4) is bonded in a 2-coordinate geometry to one Nb(2) and one Nb(3) atom. In the fifth S site, S(5) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one P(3) atom. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Rb(4), one Nb(1), one Nb(4), and one S(1) atom. In the seventh S site, S(7) is bonded in a 4-coordinate geometry to one Rb(3), one Nb(2), one Nb(3), and one S(14) atom. In the eighth S site, S(8) is bonded in a 5-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), and one P(1) atom. In the ninth S site, S(9) is bonded to one Rb(3), one Nb(1), one Nb(4), and one P(2) atom to form a mixture of distorted corner and edge-sharing SRbNb2P trigonal pyramids. In the tenth S site, S(10) is bonded in a 4-coordinate geometry to one Rb(2), one Nb(2), one Nb(3), and one P(3) atom. In the eleventh S site, S(11) is bonded in a distorted L-shaped geometry to one Nb(1) and one Nb(4) atom. In the twelfth S site, S(12) is bonded in a distorted L-shaped geometry to one Rb(4), one Nb(1), and one P(2) atom. In the thirteenth S site, S(13) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(3), and one P(3) atom. In the fourteenth S site, S(14) is bonded in a 3-coordinate geometry to one Nb(2), one Nb(3), and one S(7) atom. In the fifteenth S site, S(15) is bonded to two equivalent Rb(3), two equivalent Rb(4), and one P(2) atom to form distorted SRb4P square pyramids that share corners with four equivalent S(15)Rb4P square pyramids,  a cornercorner with one S(9)RbNb2P trigonal pyramid, corners with two equivalent S(21)RbNb2P trigonal pyramids, edges with four equivalent S(2)Rb4P square pyramids, and  an edgeedge with one S(9)RbNb2P trigonal pyramid. In the sixteenth S site, S(16) is bonded in a distorted L-shaped geometry to one Rb(4), one Nb(4), and one P(2) atom. In the seventeenth S site, S(17) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(1), and one P(1) atom. In the eighteenth S site, S(18) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one Nb(4), and one P(1) atom. In the nineteenth S site, S(19) is bonded in a distorted L-shaped geometry to one Rb(3), one Nb(3), and one P(4) atom. In the twentieth S site, S(20) is bonded in a 4-coordinate geometry to one Rb(1), one Nb(1), one Nb(4), and one P(1) atom. In the twenty-first S site, S(21) is bonded to one Rb(4), one Nb(2), one Nb(3), and one P(4) atom to form a mixture of distorted corner and edge-sharing SRbNb2P trigonal pyramids. In the twenty-second S site, S(22) is bonded in a distorted L-shaped geometry to one Rb(3), one Nb(2), and one P(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Nb2P2S11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.148
_cell_length_b   7.135
_cell_length_c   18.884
_cell_angle_alpha   81.406
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.223
_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  0.752  0.742  0.996  1.0
  Rb  Rb1  1  0.243  0.253  0.003  1.0
  Rb  Rb2  1  0.752  0.779  0.507  1.0
  Rb  Rb3  1  0.252  0.229  0.495  1.0
  Nb  Nb4  1  0.049  0.296  0.755  1.0
  Nb  Nb5  1  0.552  0.698  0.247  1.0
  Nb  Nb6  1  0.947  0.692  0.244  1.0
  Nb  Nb7  1  0.455  0.308  0.754  1.0
  P  P8  1  0.749  0.310  0.890  1.0
  P  P9  1  0.755  0.210  0.628  1.0
  P  P10  1  0.253  0.686  0.105  1.0
  P  P11  1  0.257  0.792  0.373  1.0
  S  S12  1  0.255  0.599  0.731  1.0
  S  S13  1  0.253  0.737  0.479  1.0
  S  S14  1  0.479  0.526  0.144  1.0
  S  S15  1  0.755  0.939  0.188  1.0
  S  S16  1  0.245  0.765  0.003  1.0
  S  S17  1  0.252  0.438  0.651  1.0
  S  S18  1  0.750  0.554  0.346  1.0
  S  S19  1  0.748  0.223  0.998  1.0
  S  S20  1  0.750  0.457  0.673  1.0
  S  S21  1  0.250  0.885  0.176  1.0
  S  S22  1  0.252  0.065  0.810  1.0
  S  S23  1  0.990  0.062  0.668  1.0
  S  S24  1  0.018  0.514  0.143  1.0
  S  S25  1  0.752  0.395  0.266  1.0
  S  S26  1  0.756  0.265  0.520  1.0
  S  S27  1  0.512  0.060  0.665  1.0
  S  S28  1  0.980  0.474  0.857  1.0
  S  S29  1  0.521  0.474  0.859  1.0
  S  S30  1  0.012  0.943  0.332  1.0
  S  S31  1  0.752  0.114  0.826  1.0
  S  S32  1  0.245  0.550  0.323  1.0
  S  S33  1  0.477  0.941  0.334  1.0
[/CIF]
.