The compound described by Rb2PrI5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent I(1), two equivalent I(2), two equivalent I(3), and two equivalent I(4) atoms. Pr(1) is bonded to one I(1), one I(3), one I(4), and four equivalent I(2) atoms to form distorted edge-sharing PrI7 pentagonal bipyramids. There are four inequivalent I sites. In the first I site, I(1) is bonded to four equivalent Rb(1) and one Pr(1) atom to form distorted IRb4Pr trigonal bipyramids that share  a cornercorner with one I(4)Rb4Pr trigonal bipyramid, corners with four equivalent I(1)Rb4Pr trigonal bipyramids, corners with five equivalent I(3)Rb4Pr trigonal bipyramids, corners with four equivalent I(2)Rb2Pr2 trigonal pyramids, edges with two equivalent I(3)Rb4Pr trigonal bipyramids, edges with four equivalent I(4)Rb4Pr trigonal bipyramids, and edges with four equivalent I(2)Rb2Pr2 trigonal pyramids. In the second I site, I(2) is bonded to two equivalent Rb(1) and two equivalent Pr(1) atoms to form distorted IRb2Pr2 trigonal pyramids that share corners with two equivalent I(1)Rb4Pr trigonal bipyramids, corners with two equivalent I(4)Rb4Pr trigonal bipyramids, corners with four equivalent I(3)Rb4Pr trigonal bipyramids, corners with six equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(3)Rb4Pr trigonal bipyramid, edges with two equivalent I(1)Rb4Pr trigonal bipyramids, edges with two equivalent I(4)Rb4Pr trigonal bipyramids, and  an edgeedge with one I(2)Rb2Pr2 trigonal pyramid. In the third I site, I(3) is bonded to four equivalent Rb(1) and one Pr(1) atom to form IRb4Pr trigonal bipyramids that share corners with four equivalent I(4)Rb4Pr trigonal bipyramids, corners with five equivalent I(1)Rb4Pr trigonal bipyramids, corners with eight equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(4)Rb4Pr trigonal bipyramid, edges with two equivalent I(1)Rb4Pr trigonal bipyramids, edges with two equivalent I(3)Rb4Pr trigonal bipyramids, edges with two equivalent I(2)Rb2Pr2 trigonal pyramids, and  a faceface with one I(4)Rb4Pr trigonal bipyramid. In the fourth I site, I(4) is bonded to four equivalent Rb(1) and one Pr(1) atom to form distorted IRb4Pr trigonal bipyramids that share  a cornercorner with one I(1)Rb4Pr trigonal bipyramid, corners with four equivalent I(3)Rb4Pr trigonal bipyramids, corners with four equivalent I(4)Rb4Pr trigonal bipyramids, corners with four equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(3)Rb4Pr trigonal bipyramid, edges with four equivalent I(1)Rb4Pr trigonal bipyramids, edges with four equivalent I(2)Rb2Pr2 trigonal pyramids, and  a faceface with one I(3)Rb4Pr trigonal bipyramid. is represented by the CIF card [CIF]
data_Rb2PrI5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.348
_cell_length_b   10.067
_cell_length_c   14.810
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1393.622
_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  0.941  0.003  0.827  1.0
  Rb  Rb1  1  0.059  0.997  0.173  1.0
  Rb  Rb2  1  0.441  0.997  0.673  1.0
  Rb  Rb3  1  0.059  0.503  0.173  1.0
  Rb  Rb4  1  0.559  0.003  0.327  1.0
  Rb  Rb5  1  0.941  0.497  0.827  1.0
  Rb  Rb6  1  0.559  0.497  0.327  1.0
  Rb  Rb7  1  0.441  0.503  0.673  1.0
  Pr  Pr8  1  0.921  0.750  0.506  1.0
  Pr  Pr9  1  0.079  0.250  0.494  1.0
  Pr  Pr10  1  0.421  0.250  0.994  1.0
  Pr  Pr11  1  0.579  0.750  0.006  1.0
  I  I12  1  0.124  0.750  0.680  1.0
  I  I13  1  0.876  0.250  0.320  1.0
  I  I14  1  0.624  0.250  0.820  1.0
  I  I15  1  0.376  0.750  0.180  1.0
  I  I16  1  0.832  0.046  0.574  1.0
  I  I17  1  0.168  0.954  0.426  1.0
  I  I18  1  0.332  0.954  0.926  1.0
  I  I19  1  0.168  0.546  0.426  1.0
  I  I20  1  0.668  0.046  0.074  1.0
  I  I21  1  0.832  0.454  0.574  1.0
  I  I22  1  0.668  0.454  0.074  1.0
  I  I23  1  0.332  0.546  0.926  1.0
  I  I24  1  0.575  0.750  0.509  1.0
  I  I25  1  0.425  0.250  0.491  1.0
  I  I26  1  0.075  0.250  0.991  1.0
  I  I27  1  0.925  0.750  0.009  1.0
  I  I28  1  0.658  0.750  0.796  1.0
  I  I29  1  0.342  0.250  0.204  1.0
  I  I30  1  0.158  0.250  0.704  1.0
  I  I31  1  0.842  0.750  0.296  1.0
[/CIF]
.
The compound described by Rb2PrI5 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent I(1), two equivalent I(2), two equivalent I(3), and two equivalent I(4) atoms. Pr(1) is bonded to one I(1), one I(3), one I(4), and four equivalent I(2) atoms to form distorted edge-sharing PrI7 pentagonal bipyramids. There are four inequivalent I sites. In the first I site, I(1) is bonded to four equivalent Rb(1) and one Pr(1) atom to form distorted IRb4Pr trigonal bipyramids that share  a cornercorner with one I(4)Rb4Pr trigonal bipyramid, corners with four equivalent I(1)Rb4Pr trigonal bipyramids, corners with five equivalent I(3)Rb4Pr trigonal bipyramids, corners with four equivalent I(2)Rb2Pr2 trigonal pyramids, edges with two equivalent I(3)Rb4Pr trigonal bipyramids, edges with four equivalent I(4)Rb4Pr trigonal bipyramids, and edges with four equivalent I(2)Rb2Pr2 trigonal pyramids. In the second I site, I(2) is bonded to two equivalent Rb(1) and two equivalent Pr(1) atoms to form distorted IRb2Pr2 trigonal pyramids that share corners with two equivalent I(1)Rb4Pr trigonal bipyramids, corners with two equivalent I(4)Rb4Pr trigonal bipyramids, corners with four equivalent I(3)Rb4Pr trigonal bipyramids, corners with six equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(3)Rb4Pr trigonal bipyramid, edges with two equivalent I(1)Rb4Pr trigonal bipyramids, edges with two equivalent I(4)Rb4Pr trigonal bipyramids, and  an edgeedge with one I(2)Rb2Pr2 trigonal pyramid. In the third I site, I(3) is bonded to four equivalent Rb(1) and one Pr(1) atom to form IRb4Pr trigonal bipyramids that share corners with four equivalent I(4)Rb4Pr trigonal bipyramids, corners with five equivalent I(1)Rb4Pr trigonal bipyramids, corners with eight equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(4)Rb4Pr trigonal bipyramid, edges with two equivalent I(1)Rb4Pr trigonal bipyramids, edges with two equivalent I(3)Rb4Pr trigonal bipyramids, edges with two equivalent I(2)Rb2Pr2 trigonal pyramids, and  a faceface with one I(4)Rb4Pr trigonal bipyramid. In the fourth I site, I(4) is bonded to four equivalent Rb(1) and one Pr(1) atom to form distorted IRb4Pr trigonal bipyramids that share  a cornercorner with one I(1)Rb4Pr trigonal bipyramid, corners with four equivalent I(3)Rb4Pr trigonal bipyramids, corners with four equivalent I(4)Rb4Pr trigonal bipyramids, corners with four equivalent I(2)Rb2Pr2 trigonal pyramids,  an edgeedge with one I(3)Rb4Pr trigonal bipyramid, edges with four equivalent I(1)Rb4Pr trigonal bipyramids, edges with four equivalent I(2)Rb2Pr2 trigonal pyramids, and  a faceface with one I(3)Rb4Pr trigonal bipyramid. is represented by the CIF card [CIF]
data_Rb2PrI5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.348
_cell_length_b   10.067
_cell_length_c   14.810
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1393.622
_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  0.941  0.003  0.827  1.0
  Rb  Rb1  1  0.059  0.997  0.173  1.0
  Rb  Rb2  1  0.441  0.997  0.673  1.0
  Rb  Rb3  1  0.059  0.503  0.173  1.0
  Rb  Rb4  1  0.559  0.003  0.327  1.0
  Rb  Rb5  1  0.941  0.497  0.827  1.0
  Rb  Rb6  1  0.559  0.497  0.327  1.0
  Rb  Rb7  1  0.441  0.503  0.673  1.0
  Pr  Pr8  1  0.921  0.750  0.506  1.0
  Pr  Pr9  1  0.079  0.250  0.494  1.0
  Pr  Pr10  1  0.421  0.250  0.994  1.0
  Pr  Pr11  1  0.579  0.750  0.006  1.0
  I  I12  1  0.124  0.750  0.680  1.0
  I  I13  1  0.876  0.250  0.320  1.0
  I  I14  1  0.624  0.250  0.820  1.0
  I  I15  1  0.376  0.750  0.180  1.0
  I  I16  1  0.832  0.046  0.574  1.0
  I  I17  1  0.168  0.954  0.426  1.0
  I  I18  1  0.332  0.954  0.926  1.0
  I  I19  1  0.168  0.546  0.426  1.0
  I  I20  1  0.668  0.046  0.074  1.0
  I  I21  1  0.832  0.454  0.574  1.0
  I  I22  1  0.668  0.454  0.074  1.0
  I  I23  1  0.332  0.546  0.926  1.0
  I  I24  1  0.575  0.750  0.509  1.0
  I  I25  1  0.425  0.250  0.491  1.0
  I  I26  1  0.075  0.250  0.991  1.0
  I  I27  1  0.925  0.750  0.009  1.0
  I  I28  1  0.658  0.750  0.796  1.0
  I  I29  1  0.342  0.250  0.204  1.0
  I  I30  1  0.158  0.250  0.704  1.0
  I  I31  1  0.842  0.750  0.296  1.0
[/CIF]
.