(ZnP2(HO2)4)2O2 crystallizes in the orthorhombic Fdd2 space group. The structure consists of eight water atoms inside a ZnP2(HO2)4 framework. In the ZnP2(HO2)4 framework, Zn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) 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(3) is bonded in a 3-coordinate geometry to one P(1), one H(1), and one H(2) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one H(2) atom. In the third O site, O(2) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom.
(ZnP2(HO2)4)2O2 crystallizes in the orthorhombic Fdd2 space group. The structure consists of eight water atoms inside a ZnP2(HO2)4 framework. In the ZnP2(HO2)4 framework, Zn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. Both Zn(1)-O(1) bond lengths are 1.96 Å. Both Zn(1)-O(2) bond lengths are 1.94 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.64 Å. The P(1)-O(4) bond length is 1.58 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) atom. The H(1)-O(3) bond length is 0.98 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 1.65 Å. The H(2)-O(4) bond length is 1.00 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one P(1), one H(1), and one H(2) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one H(2) atom. In the third O site, O(2) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom.