The material described by Rb2Bi(O3I)5 crystallizes in the orthorhombic Aem2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded to two equivalent O(6), two equivalent O(8), and four equivalent O(2) atoms to form distorted edge-sharing RbO8 hexagonal bipyramids. Bi(1) is bonded in a 8-coordinate geometry to two equivalent O(4), two equivalent O(5), and four equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(1) and one I(2) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Rb(2) and one I(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one I(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Bi(1), and one I(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Bi(1), and one I(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2) and one I(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one I(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(2), one I(2), and one I(3) atom. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), one O(4), and one O(8) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(8) atoms. is represented by the CIF file [CIF]
data_Rb2Bi(IO3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.416
_cell_length_b   8.494
_cell_length_c   12.673
_cell_angle_alpha   109.581
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   853.511
_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  0.000  0.648  0.000  1.0
  Rb  Rb1  1  0.000  0.148  0.000  1.0
  Rb  Rb2  1  0.525  0.383  0.500  1.0
  Rb  Rb3  1  0.475  0.883  0.500  1.0
  Bi  Bi4  1  0.500  0.747  0.000  1.0
  Bi  Bi5  1  0.500  0.247  0.000  1.0
  I  I6  1  0.757  0.743  0.734  1.0
  I  I7  1  0.243  0.010  0.266  1.0
  I  I8  1  0.243  0.243  0.734  1.0
  I  I9  1  0.757  0.510  0.266  1.0
  I  I10  1  0.729  0.994  0.211  1.0
  I  I11  1  0.271  0.782  0.789  1.0
  I  I12  1  0.271  0.494  0.211  1.0
  I  I13  1  0.729  0.282  0.789  1.0
  I  I14  1  0.061  0.440  0.500  1.0
  I  I15  1  0.939  0.940  0.500  1.0
  O  O16  1  0.932  0.987  0.162  1.0
  O  O17  1  0.068  0.825  0.838  1.0
  O  O18  1  0.068  0.487  0.162  1.0
  O  O19  1  0.932  0.325  0.838  1.0
  O  O20  1  0.558  0.735  0.675  1.0
  O  O21  1  0.442  0.060  0.325  1.0
  O  O22  1  0.442  0.235  0.675  1.0
  O  O23  1  0.558  0.560  0.325  1.0
  O  O24  1  0.620  0.012  0.085  1.0
  O  O25  1  0.380  0.927  0.915  1.0
  O  O26  1  0.380  0.512  0.085  1.0
  O  O27  1  0.620  0.427  0.915  1.0
  O  O28  1  0.686  0.767  0.161  1.0
  O  O29  1  0.314  0.606  0.839  1.0
  O  O30  1  0.314  0.267  0.161  1.0
  O  O31  1  0.686  0.106  0.839  1.0
  O  O32  1  0.714  0.748  0.877  1.0
  O  O33  1  0.286  0.870  0.123  1.0
  O  O34  1  0.286  0.248  0.877  1.0
  O  O35  1  0.714  0.370  0.123  1.0
  O  O36  1  0.810  0.522  0.672  1.0
  O  O37  1  0.190  0.850  0.328  1.0
  O  O38  1  0.190  0.022  0.672  1.0
  O  O39  1  0.810  0.350  0.328  1.0
  O  O40  1  0.102  0.228  0.500  1.0
  O  O41  1  0.898  0.728  0.500  1.0
  O  O42  1  0.196  0.554  0.614  1.0
  O  O43  1  0.804  0.940  0.386  1.0
  O  O44  1  0.804  0.054  0.614  1.0
  O  O45  1  0.196  0.440  0.386  1.0
[/CIF]
.
The material described by Rb2Bi(O3I)5 crystallizes in the orthorhombic Aem2 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to two equivalent O(4), two equivalent O(5), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded to two equivalent O(6), two equivalent O(8), and four equivalent O(2) atoms to form distorted edge-sharing RbO8 hexagonal bipyramids. Bi(1) is bonded in a 8-coordinate geometry to two equivalent O(4), two equivalent O(5), and four equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(1) and one I(2) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Rb(2) and one I(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one I(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Bi(1), and one I(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Rb(1), one Bi(1), and one I(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2) and one I(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one I(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(2), one I(2), and one I(3) atom. There are three inequivalent I sites. In the first I site, I(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(5), and one O(6) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), one O(4), and one O(8) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(8) atoms. is represented by the CIF file [CIF]
data_Rb2Bi(IO3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.416
_cell_length_b   8.494
_cell_length_c   12.673
_cell_angle_alpha   109.581
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   853.511
_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  0.000  0.648  0.000  1.0
  Rb  Rb1  1  0.000  0.148  0.000  1.0
  Rb  Rb2  1  0.525  0.383  0.500  1.0
  Rb  Rb3  1  0.475  0.883  0.500  1.0
  Bi  Bi4  1  0.500  0.747  0.000  1.0
  Bi  Bi5  1  0.500  0.247  0.000  1.0
  I  I6  1  0.757  0.743  0.734  1.0
  I  I7  1  0.243  0.010  0.266  1.0
  I  I8  1  0.243  0.243  0.734  1.0
  I  I9  1  0.757  0.510  0.266  1.0
  I  I10  1  0.729  0.994  0.211  1.0
  I  I11  1  0.271  0.782  0.789  1.0
  I  I12  1  0.271  0.494  0.211  1.0
  I  I13  1  0.729  0.282  0.789  1.0
  I  I14  1  0.061  0.440  0.500  1.0
  I  I15  1  0.939  0.940  0.500  1.0
  O  O16  1  0.932  0.987  0.162  1.0
  O  O17  1  0.068  0.825  0.838  1.0
  O  O18  1  0.068  0.487  0.162  1.0
  O  O19  1  0.932  0.325  0.838  1.0
  O  O20  1  0.558  0.735  0.675  1.0
  O  O21  1  0.442  0.060  0.325  1.0
  O  O22  1  0.442  0.235  0.675  1.0
  O  O23  1  0.558  0.560  0.325  1.0
  O  O24  1  0.620  0.012  0.085  1.0
  O  O25  1  0.380  0.927  0.915  1.0
  O  O26  1  0.380  0.512  0.085  1.0
  O  O27  1  0.620  0.427  0.915  1.0
  O  O28  1  0.686  0.767  0.161  1.0
  O  O29  1  0.314  0.606  0.839  1.0
  O  O30  1  0.314  0.267  0.161  1.0
  O  O31  1  0.686  0.106  0.839  1.0
  O  O32  1  0.714  0.748  0.877  1.0
  O  O33  1  0.286  0.870  0.123  1.0
  O  O34  1  0.286  0.248  0.877  1.0
  O  O35  1  0.714  0.370  0.123  1.0
  O  O36  1  0.810  0.522  0.672  1.0
  O  O37  1  0.190  0.850  0.328  1.0
  O  O38  1  0.190  0.022  0.672  1.0
  O  O39  1  0.810  0.350  0.328  1.0
  O  O40  1  0.102  0.228  0.500  1.0
  O  O41  1  0.898  0.728  0.500  1.0
  O  O42  1  0.196  0.554  0.614  1.0
  O  O43  1  0.804  0.940  0.386  1.0
  O  O44  1  0.804  0.054  0.614  1.0
  O  O45  1  0.196  0.440  0.386  1.0
[/CIF]
.