K2NO3Cl crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to three equivalent N(1), two equivalent O(1), and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one N(1), three equivalent O(1), and six equivalent O(2) atoms. N(1) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Cl(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cl(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cl(1) atom. Cl(1) is bonded in a tetrahedral geometry to one N(1), one O(1), and two equivalent O(2) atoms.
K2NO3Cl crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to three equivalent N(1), two equivalent O(1), and four equivalent O(2) atoms. There is one shorter (2.92 Å) and two longer (3.11 Å) K(1)-N(1) bond lengths. There is one shorter (2.82 Å) and one longer (2.97 Å) K(1)-O(1) bond length. There are two shorter (2.81 Å) and two longer (2.93 Å) K(1)-O(2) bond lengths. In the second K site, K(2) is bonded in a 10-coordinate geometry to one N(1), three equivalent O(1), and six equivalent O(2) atoms. The K(2)-N(1) bond length is 2.89 Å. There are two shorter (2.94 Å) and one longer (3.14 Å) K(2)-O(1) bond length. There are a spread of K(2)-O(2) bond distances ranging from 2.97-3.20 Å. N(1) is bonded in a 5-coordinate geometry to one K(2), three equivalent K(1), and one Cl(1) atom. The N(1)-Cl(1) bond length is 1.44 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cl(1) atom. The O(1)-Cl(1) bond length is 1.55 Å. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent K(1), three equivalent K(2), and one Cl(1) atom. The O(2)-Cl(1) bond length is 1.54 Å. Cl(1) is bonded in a tetrahedral geometry to one N(1), one O(1), and two equivalent O(2) atoms.