KPbH2OI3H2O crystallizes in the orthorhombic Pna2_1 space group. The structure consists of four water molecules inside a KPbH2OI3 framework. In the KPbH2OI3 framework, K(1) is bonded in a 2-coordinate geometry to two equivalent O(1), one I(1), one I(2), and four equivalent I(3) atoms. Pb(1) is bonded to one I(3), two equivalent I(2), and three equivalent I(1) atoms to form edge-sharing PbI6 octahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. O(1) is bonded in a distorted water-like geometry to two equivalent K(1), one H(1), and one H(2) atom. There are three inequivalent I sites. In the first I site, I(3) is bonded to four equivalent K(1) and one Pb(1) atom to form a mixture of distorted corner and edge-sharing IK4Pb square pyramids. In the second I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1) and three equivalent Pb(1) atoms. In the third I site, I(2) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Pb(1) atoms.
KPbH2OI3H2O crystallizes in the orthorhombic Pna2_1 space group. The structure consists of four water molecules inside a KPbH2OI3 framework. In the KPbH2OI3 framework, K(1) is bonded in a 2-coordinate geometry to two equivalent O(1), one I(1), one I(2), and four equivalent I(3) atoms. Both K(1)-O(1) bond lengths are 2.86 Å. The K(1)-I(1) bond length is 4.08 Å. The K(1)-I(2) bond length is 4.03 Å. There are two shorter (3.72 Å) and two longer (3.78 Å) K(1)-I(3) bond lengths. Pb(1) is bonded to one I(3), two equivalent I(2), and three equivalent I(1) atoms to form edge-sharing PbI6 octahedra. The Pb(1)-I(3) bond length is 3.07 Å. There is one shorter (3.25 Å) and one longer (3.26 Å) Pb(1)-I(2) bond length. There are a spread of Pb(1)-I(1) bond distances ranging from 3.28-3.50 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.98 Å. O(1) is bonded in a distorted water-like geometry to two equivalent K(1), one H(1), and one H(2) atom. There are three inequivalent I sites. In the first I site, I(3) is bonded to four equivalent K(1) and one Pb(1) atom to form a mixture of distorted corner and edge-sharing IK4Pb square pyramids. In the second I site, I(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1) and three equivalent Pb(1) atoms. In the third I site, I(2) is bonded in a 3-coordinate geometry to one K(1) and two equivalent Pb(1) atoms.