KHSi2O5 crystallizes in the orthorhombic Pna2_1 space group. K(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. H(1) is bonded in a linear geometry to one O(4) and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Si(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Si(2), and one H(1) atom.
KHSi2O5 crystallizes in the orthorhombic Pna2_1 space group. K(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms. The K(1)-O(2) bond length is 2.94 Å. The K(1)-O(3) bond length is 3.02 Å. There is one shorter (2.86 Å) and one longer (2.94 Å) K(1)-O(4) bond length. There is one shorter (2.87 Å) and one longer (2.89 Å) K(1)-O(5) bond length. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.64 Å. The Si(1)-O(2) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.62 Å. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. The Si(2)-O(1) bond length is 1.65 Å. The Si(2)-O(2) bond length is 1.66 Å. The Si(2)-O(3) bond length is 1.65 Å. The Si(2)-O(5) bond length is 1.60 Å. H(1) is bonded in a linear geometry to one O(4) and one O(5) atom. The H(1)-O(4) bond length is 1.09 Å. The H(1)-O(5) bond length is 1.39 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Si(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Si(2), and one H(1) atom.