KAs2HO6 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing AsO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-60°. In the second As site, As(2) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form AsO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra and  an edgeedge with one As(2)O6 octahedra. H(1) is bonded in a single-bond geometry to one O(1) and one O(5) atom. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one As(2), and one H(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one K(1) and two equivalent As(2) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one As(1), and one H(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one As(1), and one As(2) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one K(1), one As(1), and one As(2) atom.
KAs2HO6 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms. The K(1)-O(2) bond length is 2.79 Å. The K(1)-O(4) bond length is 2.86 Å. The K(1)-O(5) bond length is 2.96 Å. The K(1)-O(6) bond length is 2.73 Å. There is one shorter (2.75 Å) and one longer (2.87 Å) K(1)-O(1) bond length. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing AsO4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-60°. The As(1)-O(1) bond length is 1.68 Å. The As(1)-O(2) bond length is 1.75 Å. The As(1)-O(3) bond length is 1.75 Å. The As(1)-O(4) bond length is 1.76 Å. In the second As site, As(2) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form AsO6 octahedra that share corners with three equivalent As(1)O4 tetrahedra and  an edgeedge with one As(2)O6 octahedra. The As(2)-O(2) bond length is 1.92 Å. The As(2)-O(3) bond length is 1.91 Å. The As(2)-O(4) bond length is 1.87 Å. The As(2)-O(5) bond length is 1.79 Å. There is one shorter (1.85 Å) and one longer (1.86 Å) As(2)-O(6) bond length. H(1) is bonded in a single-bond geometry to one O(1) and one O(5) atom. The H(1)-O(1) bond length is 1.74 Å. The H(1)-O(5) bond length is 1.00 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one As(2), and one H(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one K(1) and two equivalent As(2) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one As(1), and one H(1) atom. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one As(1), and one As(2) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one K(1), one As(1), and one As(2) atom.