The crystal structure described by RbI3 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent I(1), four equivalent I(2), and four equivalent I(3) atoms. There are three inequivalent I sites. In the first I site, I(2) is bonded in a 5-coordinate geometry to four equivalent Rb(1) and one I(1) atom. In the second I site, I(1) is bonded to two equivalent Rb(1), one I(2), and one I(3) atom to form distorted corner-sharing IRb2I2 tetrahedra. In the third I site, I(3) is bonded in a 5-coordinate geometry to four equivalent Rb(1) and one I(1) atom. is represented by the CIF card [CIF]
data_RbI3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.760
_cell_length_b   9.948
_cell_length_c   10.880
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   731.688
_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  0.474  0.827  1.0
  Rb  Rb1  1  0.750  0.526  0.173  1.0
  Rb  Rb2  1  0.750  0.974  0.673  1.0
  Rb  Rb3  1  0.250  0.026  0.327  1.0
  I  I4  1  0.250  0.545  0.373  1.0
  I  I5  1  0.750  0.455  0.627  1.0
  I  I6  1  0.750  0.045  0.127  1.0
  I  I7  1  0.250  0.955  0.873  1.0
  I  I8  1  0.250  0.736  0.573  1.0
  I  I9  1  0.750  0.264  0.427  1.0
  I  I10  1  0.750  0.236  0.927  1.0
  I  I11  1  0.250  0.764  0.073  1.0
  I  I12  1  0.250  0.149  0.659  1.0
  I  I13  1  0.750  0.851  0.341  1.0
  I  I14  1  0.750  0.649  0.841  1.0
  I  I15  1  0.250  0.351  0.159  1.0
[/CIF]
.
The crystal structure described by RbI3 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent I(1), four equivalent I(2), and four equivalent I(3) atoms. There are three inequivalent I sites. In the first I site, I(2) is bonded in a 5-coordinate geometry to four equivalent Rb(1) and one I(1) atom. In the second I site, I(1) is bonded to two equivalent Rb(1), one I(2), and one I(3) atom to form distorted corner-sharing IRb2I2 tetrahedra. In the third I site, I(3) is bonded in a 5-coordinate geometry to four equivalent Rb(1) and one I(1) atom. is represented by the CIF card [CIF]
data_RbI3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.760
_cell_length_b   9.948
_cell_length_c   10.880
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   731.688
_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  0.474  0.827  1.0
  Rb  Rb1  1  0.750  0.526  0.173  1.0
  Rb  Rb2  1  0.750  0.974  0.673  1.0
  Rb  Rb3  1  0.250  0.026  0.327  1.0
  I  I4  1  0.250  0.545  0.373  1.0
  I  I5  1  0.750  0.455  0.627  1.0
  I  I6  1  0.750  0.045  0.127  1.0
  I  I7  1  0.250  0.955  0.873  1.0
  I  I8  1  0.250  0.736  0.573  1.0
  I  I9  1  0.750  0.264  0.427  1.0
  I  I10  1  0.750  0.236  0.927  1.0
  I  I11  1  0.250  0.764  0.073  1.0
  I  I12  1  0.250  0.149  0.659  1.0
  I  I13  1  0.750  0.851  0.341  1.0
  I  I14  1  0.750  0.649  0.841  1.0
  I  I15  1  0.250  0.351  0.159  1.0
[/CIF]
.