CsH2PO4 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. In the second H site, H(2) is bonded in a linear geometry to one O(3) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one H(2) atom.
CsH2PO4 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Cs(1)-O(1) bond length is 3.12 Å. The Cs(1)-O(2) bond length is 3.23 Å. The Cs(1)-O(3) bond length is 3.13 Å. The Cs(1)-O(4) bond length is 3.10 Å. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The P(1)-O(1) bond length is 1.50 Å. The P(1)-O(2) bond length is 1.57 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(4) bond length is 1.57 Å. There are two inequivalent H sites. In the first H site, 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 1.50 Å. The H(1)-O(2) bond length is 1.01 Å. In the second H site, H(2) is bonded in a linear geometry to one O(3) and one O(4) atom. The H(2)-O(3) bond length is 1.45 Å. The H(2)-O(4) bond length is 1.04 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one H(2) atom.