CsAsO3 crystallizes in the orthorhombic Pbcm space group. Cs(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(2), and four equivalent O(1) 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 in a distorted single-bond geometry to four equivalent Cs(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Cs(1) and two equivalent As(1) atoms.
CsAsO3 crystallizes in the orthorhombic Pbcm space group. Cs(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(2), and four equivalent O(1) atoms. Both Cs(1)-O(3) bond lengths are 3.15 Å. There is one shorter (3.07 Å) and two longer (3.32 Å) Cs(1)-O(2) bond lengths. There are a spread of Cs(1)-O(1) bond distances ranging from 3.11-3.23 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 in a distorted single-bond geometry to four equivalent Cs(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one As(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Cs(1) and two equivalent As(1) atoms.