The crystal structure described by Rb2OI crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a distorted T-shaped geometry to three equivalent O(1) and five equivalent I(1) atoms. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(1) and four equivalent I(1) atoms. O(1) is bonded to two equivalent Rb(2) and three equivalent Rb(1) atoms to form a mixture of corner and edge-sharing ORb5 trigonal bipyramids. I(1) is bonded in a 9-coordinate geometry to four equivalent Rb(2) and five equivalent Rb(1) atoms. is represented by the CIF card [CIF]
data_Rb2IO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.549
_cell_length_b   8.074
_cell_length_c   12.983
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   581.598
_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  0.651  0.949  1.0
  Rb  Rb1  1  0.250  0.151  0.551  1.0
  Rb  Rb2  1  0.750  0.349  0.051  1.0
  Rb  Rb3  1  0.750  0.849  0.449  1.0
  Rb  Rb4  1  0.250  0.607  0.270  1.0
  Rb  Rb5  1  0.250  0.107  0.230  1.0
  Rb  Rb6  1  0.750  0.393  0.730  1.0
  Rb  Rb7  1  0.750  0.893  0.770  1.0
  I  I8  1  0.250  0.659  0.625  1.0
  I  I9  1  0.250  0.159  0.875  1.0
  I  I10  1  0.750  0.341  0.375  1.0
  I  I11  1  0.750  0.841  0.125  1.0
  O  O12  1  0.250  0.900  0.390  1.0
  O  O13  1  0.250  0.400  0.110  1.0
  O  O14  1  0.750  0.100  0.610  1.0
  O  O15  1  0.750  0.600  0.890  1.0
[/CIF]
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The crystal structure described by Rb2OI crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a distorted T-shaped geometry to three equivalent O(1) and five equivalent I(1) atoms. In the second Rb site, Rb(2) is bonded in a 2-coordinate geometry to two equivalent O(1) and four equivalent I(1) atoms. O(1) is bonded to two equivalent Rb(2) and three equivalent Rb(1) atoms to form a mixture of corner and edge-sharing ORb5 trigonal bipyramids. I(1) is bonded in a 9-coordinate geometry to four equivalent Rb(2) and five equivalent Rb(1) atoms. is represented by the CIF card [CIF]
data_Rb2IO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.549
_cell_length_b   8.074
_cell_length_c   12.983
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   581.598
_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  0.651  0.949  1.0
  Rb  Rb1  1  0.250  0.151  0.551  1.0
  Rb  Rb2  1  0.750  0.349  0.051  1.0
  Rb  Rb3  1  0.750  0.849  0.449  1.0
  Rb  Rb4  1  0.250  0.607  0.270  1.0
  Rb  Rb5  1  0.250  0.107  0.230  1.0
  Rb  Rb6  1  0.750  0.393  0.730  1.0
  Rb  Rb7  1  0.750  0.893  0.770  1.0
  I  I8  1  0.250  0.659  0.625  1.0
  I  I9  1  0.250  0.159  0.875  1.0
  I  I10  1  0.750  0.341  0.375  1.0
  I  I11  1  0.750  0.841  0.125  1.0
  O  O12  1  0.250  0.900  0.390  1.0
  O  O13  1  0.250  0.400  0.110  1.0
  O  O14  1  0.750  0.100  0.610  1.0
  O  O15  1  0.750  0.600  0.890  1.0
[/CIF]
.