KNO3 crystallizes in the orthorhombic Pnma space group. K(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing KO7 pentagonal bipyramids. N(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(1) atom.
KNO3 crystallizes in the orthorhombic Pnma space group. K(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing KO7 pentagonal bipyramids. There is one shorter (2.76 Å) and two longer (2.91 Å) K(1)-O(1) bond lengths. There are two shorter (2.77 Å) and two longer (2.85 Å) K(1)-O(2) bond lengths. N(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. The N(1)-O(1) bond length is 1.28 Å. Both N(1)-O(2) bond lengths are 1.27 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(1) atom.