KAsO3 crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(1), and three equivalent O(2) atoms. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing AsO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent K(1) and one As(1) atom to form distorted corner-sharing OK3As tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1) and two equivalent As(1) atoms.
KAsO3 crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(1), and three equivalent O(2) atoms. The K(1)-O(3) bond length is 3.02 Å. There are a spread of K(1)-O(1) bond distances ranging from 2.73-3.00 Å. There are a spread of K(1)-O(2) bond distances ranging from 2.72-3.07 Å. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing AsO4 tetrahedra. The As(1)-O(1) bond length is 1.65 Å. The As(1)-O(2) bond length is 1.65 Å. Both As(1)-O(3) bond lengths are 1.78 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent K(1) and one As(1) atom to form distorted corner-sharing OK3As tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent K(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1) and two equivalent As(1) atoms.