CsH2AsO4 crystallizes in the orthorhombic Fdd2 space group. Cs(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Cs(1), one As(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one As(1), and one H(1) atom.
CsH2AsO4 crystallizes in the orthorhombic Fdd2 space group. Cs(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two shorter (3.16 Å) and two longer (3.35 Å) Cs(1)-O(1) bond lengths. There are two shorter (3.09 Å) and two longer (3.30 Å) Cs(1)-O(2) bond lengths. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both As(1)-O(1) bond lengths are 1.77 Å. Both As(1)-O(2) bond lengths are 1.70 Å. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. The H(1)-O(1) bond length is 1.06 Å. The H(1)-O(2) bond length is 1.49 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Cs(1), one As(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one As(1), and one H(1) atom.