The material described by K2O9I crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(8), two equivalent O(1), and two equivalent O(2) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1) and one I(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one I(1) atom. In the third O site, O(3) is bonded in a linear geometry to one K(2) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one K(2) and one I(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one K(1) and one O(9) atom. In the sixth O site, O(6) is bonded to one K(1), two equivalent K(2), and one O(9) atom to form distorted edge-sharing OK3O tetrahedra. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent K(2) and one O(8) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one K(1) and one O(7) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one O(5), and one O(6) atom. I(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2IO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.618
_cell_length_b   7.690
_cell_length_c   9.245
_cell_angle_alpha   84.496
_cell_angle_beta   102.706
_cell_angle_gamma   116.317
_symmetry_Int_Tables_number   1
_cell_volume   473.577
_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
  K  K0  1  0.265  0.798  0.044  1.0
  K  K1  1  0.735  0.202  0.956  1.0
  K  K2  1  0.675  0.827  0.600  1.0
  K  K3  1  0.325  0.173  0.400  1.0
  I  I4  1  0.761  0.700  0.155  1.0
  I  I5  1  0.239  0.300  0.845  1.0
  O  O6  1  0.858  0.582  0.057  1.0
  O  O7  1  0.142  0.418  0.943  1.0
  O  O8  1  0.382  0.204  0.982  1.0
  O  O9  1  0.618  0.796  0.018  1.0
  O  O10  1  0.972  0.897  0.257  1.0
  O  O11  1  0.028  0.103  0.743  1.0
  O  O12  1  0.604  0.540  0.277  1.0
  O  O13  1  0.396  0.460  0.723  1.0
  O  O14  1  0.848  0.228  0.268  1.0
  O  O15  1  0.152  0.772  0.732  1.0
  O  O16  1  0.548  0.998  0.320  1.0
  O  O17  1  0.452  0.002  0.680  1.0
  O  O18  1  0.285  0.548  0.415  1.0
  O  O19  1  0.715  0.452  0.585  1.0
  O  O20  1  0.802  0.352  0.640  1.0
  O  O21  1  0.198  0.648  0.360  1.0
  O  O22  1  0.744  0.133  0.371  1.0
  O  O23  1  0.256  0.867  0.629  1.0
[/CIF]
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The material described by K2O9I crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(5), one O(6), one O(8), two equivalent O(1), and two equivalent O(2) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(9), two equivalent O(6), and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1) and one I(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one I(1) atom. In the third O site, O(3) is bonded in a linear geometry to one K(2) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one K(2) and one I(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one K(1) and one O(9) atom. In the sixth O site, O(6) is bonded to one K(1), two equivalent K(2), and one O(9) atom to form distorted edge-sharing OK3O tetrahedra. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent K(2) and one O(8) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one K(1) and one O(7) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one O(5), and one O(6) atom. I(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2IO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.618
_cell_length_b   7.690
_cell_length_c   9.245
_cell_angle_alpha   84.496
_cell_angle_beta   102.706
_cell_angle_gamma   116.317
_symmetry_Int_Tables_number   1
_cell_volume   473.577
_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
  K  K0  1  0.265  0.798  0.044  1.0
  K  K1  1  0.735  0.202  0.956  1.0
  K  K2  1  0.675  0.827  0.600  1.0
  K  K3  1  0.325  0.173  0.400  1.0
  I  I4  1  0.761  0.700  0.155  1.0
  I  I5  1  0.239  0.300  0.845  1.0
  O  O6  1  0.858  0.582  0.057  1.0
  O  O7  1  0.142  0.418  0.943  1.0
  O  O8  1  0.382  0.204  0.982  1.0
  O  O9  1  0.618  0.796  0.018  1.0
  O  O10  1  0.972  0.897  0.257  1.0
  O  O11  1  0.028  0.103  0.743  1.0
  O  O12  1  0.604  0.540  0.277  1.0
  O  O13  1  0.396  0.460  0.723  1.0
  O  O14  1  0.848  0.228  0.268  1.0
  O  O15  1  0.152  0.772  0.732  1.0
  O  O16  1  0.548  0.998  0.320  1.0
  O  O17  1  0.452  0.002  0.680  1.0
  O  O18  1  0.285  0.548  0.415  1.0
  O  O19  1  0.715  0.452  0.585  1.0
  O  O20  1  0.802  0.352  0.640  1.0
  O  O21  1  0.198  0.648  0.360  1.0
  O  O22  1  0.744  0.133  0.371  1.0
  O  O23  1  0.256  0.867  0.629  1.0
[/CIF]
.