K3H(SO4)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 12-coordinate geometry to two equivalent H(1), two equivalent O(1), two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), three equivalent O(1), and three equivalent O(4) atoms. H(1) is bonded in a linear geometry to two equivalent K(1) and two equivalent O(3) atoms. S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one K(2), two equivalent K(1), one H(1), and one S(1) atom. In the second O site, O(4) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one S(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one S(1) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom.
K3H(SO4)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 12-coordinate geometry to two equivalent H(1), two equivalent O(1), two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Both K(1)-H(1) bond lengths are 2.88 Å. Both K(1)-O(1) bond lengths are 2.94 Å. Both K(1)-O(2) bond lengths are 2.75 Å. Both K(1)-O(4) bond lengths are 2.91 Å. There are two shorter (3.12 Å) and two longer (3.14 Å) K(1)-O(3) bond lengths. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), three equivalent O(1), and three equivalent O(4) atoms. The K(2)-O(3) bond length is 3.04 Å. There is one shorter (2.94 Å) and one longer (3.05 Å) K(2)-O(2) bond length. There are a spread of K(2)-O(1) bond distances ranging from 2.88-3.04 Å. There are two shorter (2.90 Å) and one longer (3.02 Å) K(2)-O(4) bond length. H(1) is bonded in a linear geometry to two equivalent K(1) and two equivalent O(3) atoms. Both H(1)-O(3) bond lengths are 1.22 Å. S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The S(1)-O(1) bond length is 1.48 Å. The S(1)-O(2) bond length is 1.47 Å. The S(1)-O(3) bond length is 1.56 Å. The S(1)-O(4) bond length is 1.48 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted water-like geometry to one K(2), two equivalent K(1), one H(1), and one S(1) atom. In the second O site, O(4) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one S(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one S(1) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom.