ZnP2(H4O5)2 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form ZnO6 octahedra 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)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-51°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(2) and one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) and one O(5) atom. In the third H site, H(3) is bonded in a distorted linear geometry to one O(3) and one O(5) atom. In the fourth H site, H(4) is bonded in a distorted bent 150 degrees geometry to one O(1) and one O(4) atom. There are five inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one P(1), one H(2), and one H(4) atom. In the second O site, O(5) is bonded in a distorted water-like geometry to one Zn(1), one H(1), one H(2), and one H(3) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one P(1), and one H(4) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one P(1), and one H(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one H(3) atom.
ZnP2(H4O5)2 crystallizes in the monoclinic P2_1/c space group. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. Both Zn(1)-O(1) bond lengths are 2.10 Å. Both Zn(1)-O(2) bond lengths are 2.14 Å. Both Zn(1)-O(5) bond lengths are 2.09 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)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-51°. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.57 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(2) and one O(5) atom. The H(1)-O(2) bond length is 1.64 Å. The H(1)-O(5) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) and one O(5) atom. The H(2)-O(4) bond length is 1.66 Å. The H(2)-O(5) bond length is 0.99 Å. In the third H site, H(3) is bonded in a distorted linear geometry to one O(3) and one O(5) atom. The H(3)-O(3) bond length is 1.00 Å. The H(3)-O(5) bond length is 1.63 Å. In the fourth H site, H(4) is bonded in a distorted bent 150 degrees geometry to one O(1) and one O(4) atom. The H(4)-O(1) bond length is 1.53 Å. The H(4)-O(4) bond length is 1.02 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one P(1), one H(2), and one H(4) atom. In the second O site, O(5) is bonded in a distorted water-like geometry to one Zn(1), one H(1), one H(2), and one H(3) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one P(1), and one H(4) atom. In the fourth O site, O(2) is bonded in a distorted trigonal planar geometry to one Zn(1), one P(1), and one H(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one H(3) atom.