KZnP2H5O9 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), one O(8), one O(9), two equivalent O(3), and two equivalent O(7) atoms. Zn(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(9) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. In the third H site, H(3) is bonded in a linear geometry to one O(1) and one O(8) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(5) atom. In the fifth H site, H(5) is bonded in a linear geometry to one O(2) and one O(9) atom. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a distorted water-like geometry to one K(1), one H(1), one H(2), and one H(5) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to one P(1), one H(3), and one H(4) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one H(5) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to two equivalent K(1), one Zn(1), and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(4) atom. In the seventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the eighth O site, O(7) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Zn(1), and one P(2) atom. In the ninth O site, O(8) is bonded in a distorted water-like geometry to one K(1), one P(2), and one H(3) atom.
KZnP2H5O9 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), one O(8), one O(9), two equivalent O(3), and two equivalent O(7) atoms. The K(1)-O(2) bond length is 3.18 Å. The K(1)-O(5) bond length is 2.92 Å. The K(1)-O(8) bond length is 3.03 Å. The K(1)-O(9) bond length is 2.84 Å. There is one shorter (2.92 Å) and one longer (3.06 Å) K(1)-O(3) bond length. There is one shorter (3.03 Å) and one longer (3.37 Å) K(1)-O(7) bond length. Zn(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(4) bond length is 1.95 Å. The Zn(1)-O(6) bond length is 1.96 Å. The Zn(1)-O(7) bond length is 1.99 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.59 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(6) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. The P(2)-O(4) bond length is 1.53 Å. The P(2)-O(5) bond length is 1.57 Å. The P(2)-O(7) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.59 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(9) atom. The H(1)-O(9) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. The H(2)-O(9) bond length is 1.00 Å. In the third H site, H(3) is bonded in a linear geometry to one O(1) and one O(8) atom. The H(3)-O(1) bond length is 1.56 Å. The H(3)-O(8) bond length is 1.03 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(1) and one O(5) atom. The H(4)-O(1) bond length is 1.50 Å. The H(4)-O(5) bond length is 1.04 Å. In the fifth H site, H(5) is bonded in a linear geometry to one O(2) and one O(9) atom. The H(5)-O(2) bond length is 1.03 Å. The H(5)-O(9) bond length is 1.59 Å. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a distorted water-like geometry to one K(1), one H(1), one H(2), and one H(5) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to one P(1), one H(3), and one H(4) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one H(5) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to two equivalent K(1), one Zn(1), and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(4) atom. In the seventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the eighth O site, O(7) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one Zn(1), and one P(2) atom. In the ninth O site, O(8) is bonded in a distorted water-like geometry to one K(1), one P(2), and one H(3) atom.