The crystal structure described by RbSnI3 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent I(2), three equivalent I(3), and four equivalent I(1) atoms. Sn(1) is bonded to one I(1), two equivalent I(3), and three equivalent I(2) atoms to form edge-sharing SnI6 octahedra. There are three inequivalent I sites. In the first I site, I(1) is bonded to four equivalent Rb(1) and one Sn(1) atom to form distorted IRb4Sn square pyramids that share corners with four equivalent I(1)Rb4Sn square pyramids, corners with three equivalent I(2)Rb2Sn3 trigonal bipyramids, corners with six equivalent I(3)Rb3Sn2 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with four equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with four equivalent I(3)Rb3Sn2 trigonal bipyramids. In the second I site, I(2) is bonded to two equivalent Rb(1) and three equivalent Sn(1) atoms to form distorted IRb2Sn3 trigonal bipyramids that share corners with three equivalent I(1)Rb4Sn square pyramids, corners with four equivalent I(2)Rb2Sn3 trigonal bipyramids, corners with six equivalent I(3)Rb3Sn2 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with two equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with three equivalent I(3)Rb3Sn2 trigonal bipyramids. In the third I site, I(3) is bonded to three equivalent Rb(1) and two equivalent Sn(1) atoms to form distorted IRb3Sn2 trigonal bipyramids that share corners with six equivalent I(1)Rb4Sn square pyramids, corners with six equivalent I(2)Rb2Sn3 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with three equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with four equivalent I(3)Rb3Sn2 trigonal bipyramids. is represented by the CIF file [CIF]
data_RbSnI3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.753
_cell_length_b   10.407
_cell_length_c   17.439
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   862.579
_cell_formula_units_Z   4
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  0.250  0.585  0.172  1.0
  Rb  Rb1  1  0.250  0.085  0.328  1.0
  Rb  Rb2  1  0.750  0.415  0.828  1.0
  Rb  Rb3  1  0.750  0.915  0.672  1.0
  Sn  Sn4  1  0.750  0.162  0.061  1.0
  Sn  Sn5  1  0.250  0.338  0.561  1.0
  Sn  Sn6  1  0.250  0.838  0.939  1.0
  Sn  Sn7  1  0.750  0.662  0.439  1.0
  I  I8  1  0.250  0.699  0.789  1.0
  I  I9  1  0.250  0.475  0.383  1.0
  I  I10  1  0.750  0.525  0.617  1.0
  I  I11  1  0.250  0.975  0.117  1.0
  I  I12  1  0.750  0.161  0.495  1.0
  I  I13  1  0.250  0.839  0.505  1.0
  I  I14  1  0.750  0.661  0.005  1.0
  I  I15  1  0.250  0.339  0.995  1.0
  I  I16  1  0.750  0.301  0.211  1.0
  I  I17  1  0.250  0.199  0.711  1.0
  I  I18  1  0.750  0.801  0.289  1.0
  I  I19  1  0.750  0.025  0.883  1.0
[/CIF]
.
The crystal structure described by RbSnI3 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 9-coordinate geometry to two equivalent I(2), three equivalent I(3), and four equivalent I(1) atoms. Sn(1) is bonded to one I(1), two equivalent I(3), and three equivalent I(2) atoms to form edge-sharing SnI6 octahedra. There are three inequivalent I sites. In the first I site, I(1) is bonded to four equivalent Rb(1) and one Sn(1) atom to form distorted IRb4Sn square pyramids that share corners with four equivalent I(1)Rb4Sn square pyramids, corners with three equivalent I(2)Rb2Sn3 trigonal bipyramids, corners with six equivalent I(3)Rb3Sn2 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with four equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with four equivalent I(3)Rb3Sn2 trigonal bipyramids. In the second I site, I(2) is bonded to two equivalent Rb(1) and three equivalent Sn(1) atoms to form distorted IRb2Sn3 trigonal bipyramids that share corners with three equivalent I(1)Rb4Sn square pyramids, corners with four equivalent I(2)Rb2Sn3 trigonal bipyramids, corners with six equivalent I(3)Rb3Sn2 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with two equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with three equivalent I(3)Rb3Sn2 trigonal bipyramids. In the third I site, I(3) is bonded to three equivalent Rb(1) and two equivalent Sn(1) atoms to form distorted IRb3Sn2 trigonal bipyramids that share corners with six equivalent I(1)Rb4Sn square pyramids, corners with six equivalent I(2)Rb2Sn3 trigonal bipyramids, edges with four equivalent I(1)Rb4Sn square pyramids, edges with three equivalent I(2)Rb2Sn3 trigonal bipyramids, and edges with four equivalent I(3)Rb3Sn2 trigonal bipyramids. is represented by the CIF file [CIF]
data_RbSnI3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.753
_cell_length_b   10.407
_cell_length_c   17.439
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   862.579
_cell_formula_units_Z   4
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  0.250  0.585  0.172  1.0
  Rb  Rb1  1  0.250  0.085  0.328  1.0
  Rb  Rb2  1  0.750  0.415  0.828  1.0
  Rb  Rb3  1  0.750  0.915  0.672  1.0
  Sn  Sn4  1  0.750  0.162  0.061  1.0
  Sn  Sn5  1  0.250  0.338  0.561  1.0
  Sn  Sn6  1  0.250  0.838  0.939  1.0
  Sn  Sn7  1  0.750  0.662  0.439  1.0
  I  I8  1  0.250  0.699  0.789  1.0
  I  I9  1  0.250  0.475  0.383  1.0
  I  I10  1  0.750  0.525  0.617  1.0
  I  I11  1  0.250  0.975  0.117  1.0
  I  I12  1  0.750  0.161  0.495  1.0
  I  I13  1  0.250  0.839  0.505  1.0
  I  I14  1  0.750  0.661  0.005  1.0
  I  I15  1  0.250  0.339  0.995  1.0
  I  I16  1  0.750  0.301  0.211  1.0
  I  I17  1  0.250  0.199  0.711  1.0
  I  I18  1  0.750  0.801  0.289  1.0
  I  I19  1  0.750  0.025  0.883  1.0
[/CIF]
.