KH2(IO3)3 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(15), one O(17), and one O(4) atom. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(11), one O(18), one O(3), and one O(9) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(14) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(13) and one O(5) atom. In the third H site, H(3) is bonded in a linear geometry to one O(15) and one O(16) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(2) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one H(4) and one I(5) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one H(4) and one I(6) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one K(2) and one I(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1) and one I(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one H(2) and one I(5) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one I(6) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one I(1) and one I(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one I(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one K(2), one I(4), and one I(5) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one K(1) and one I(6) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one K(2), one I(1), and one I(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one K(1), one I(2), and one I(4) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one H(2) and one I(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one H(1) and one I(4) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one K(1), one H(3), and one I(3) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one H(3) and one I(4) atom. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one K(1) and one I(1) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(2), one I(2), and one I(6) atom. There are six inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(11), one O(17), and one O(7) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(12), one O(18), and one O(8) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(11), one O(13), one O(15), and one O(3) atom. In the fourth I site, I(4) is bonded in a distorted octahedral geometry to one O(12), one O(14), one O(16), one O(4), one O(7), and one O(9) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(9) atom. In the sixth I site, I(6) is bonded in a 3-coordinate geometry to one O(10), one O(18), one O(2), and one O(6) atom.
KH2(IO3)3 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(15), one O(17), and one O(4) atom. The K(1)-O(10) bond length is 2.87 Å. The K(1)-O(12) bond length is 2.95 Å. The K(1)-O(15) bond length is 2.99 Å. The K(1)-O(17) bond length is 2.84 Å. The K(1)-O(4) bond length is 2.94 Å. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(11), one O(18), one O(3), and one O(9) atom. The K(2)-O(11) bond length is 2.90 Å. The K(2)-O(18) bond length is 2.83 Å. The K(2)-O(3) bond length is 2.91 Å. The K(2)-O(9) bond length is 2.86 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(14) atom. The H(1)-O(14) bond length is 1.01 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(13) and one O(5) atom. The H(2)-O(13) bond length is 1.01 Å. The H(2)-O(5) bond length is 1.70 Å. In the third H site, H(3) is bonded in a linear geometry to one O(15) and one O(16) atom. The H(3)-O(15) bond length is 1.50 Å. The H(3)-O(16) bond length is 1.05 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(2) atom. The H(4)-O(1) bond length is 1.52 Å. The H(4)-O(2) bond length is 1.05 Å. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one H(4) and one I(5) atom. The O(1)-I(5) bond length is 1.85 Å. In the second O site, O(2) is bonded in a distorted single-bond geometry to one H(4) and one I(6) atom. The O(2)-I(6) bond length is 1.94 Å. In the third O site, O(3) is bonded in a 1-coordinate geometry to one K(2) and one I(3) atom. The O(3)-I(3) bond length is 1.81 Å. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1) and one I(4) atom. The O(4)-I(4) bond length is 1.81 Å. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one H(2) and one I(5) atom. The O(5)-I(5) bond length is 1.83 Å. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one I(6) atom. The O(6)-I(6) bond length is 1.82 Å. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one I(1) and one I(4) atom. The O(7)-I(1) bond length is 1.88 Å. The O(7)-I(4) bond length is 2.56 Å. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one I(2) atom. The O(8)-I(2) bond length is 1.85 Å. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one K(2), one I(4), and one I(5) atom. The O(9)-I(4) bond length is 2.48 Å. The O(9)-I(5) bond length is 1.85 Å. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one K(1) and one I(6) atom. The O(10)-I(6) bond length is 1.82 Å. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one K(2), one I(1), and one I(3) atom. The O(11)-I(1) bond length is 1.83 Å. The O(11)-I(3) bond length is 2.55 Å. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one K(1), one I(2), and one I(4) atom. The O(12)-I(2) bond length is 1.84 Å. The O(12)-I(4) bond length is 2.50 Å. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one H(2) and one I(3) atom. The O(13)-I(3) bond length is 1.93 Å. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one H(1) and one I(4) atom. The O(14)-I(4) bond length is 1.92 Å. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one K(1), one H(3), and one I(3) atom. The O(15)-I(3) bond length is 1.85 Å. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one H(3) and one I(4) atom. The O(16)-I(4) bond length is 1.94 Å. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one K(1) and one I(1) atom. The O(17)-I(1) bond length is 1.82 Å. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one K(2), one I(2), and one I(6) atom. The O(18)-I(2) bond length is 1.83 Å. The O(18)-I(6) bond length is 2.59 Å. There are six inequivalent I sites. In the first I site, I(1) is bonded in a 3-coordinate geometry to one O(11), one O(17), and one O(7) atom. In the second I site, I(2) is bonded in a 3-coordinate geometry to one O(12), one O(18), and one O(8) atom. In the third I site, I(3) is bonded in a 3-coordinate geometry to one O(11), one O(13), one O(15), and one O(3) atom. In the fourth I site, I(4) is bonded in a distorted octahedral geometry to one O(12), one O(14), one O(16), one O(4), one O(7), and one O(9) atom. In the fifth I site, I(5) is bonded in a 3-coordinate geometry to one O(1), one O(5), and one O(9) atom. In the sixth I site, I(6) is bonded in a 3-coordinate geometry to one O(10), one O(18), one O(2), and one O(6) atom.