(Zn4Si2O7(OH)2)2O2 crystallizes in the orthorhombic Pnn2 space group. The structure consists of two water atoms inside a Zn4Si2O7(OH)2 framework. In the Zn4Si2O7(OH)2 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with three equivalent Zn(2)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one O(4) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one H(1) atom.
(Zn4Si2O7(OH)2)2O2 crystallizes in the orthorhombic Pnn2 space group. The structure consists of two water atoms inside a Zn4Si2O7(OH)2 framework. In the Zn4Si2O7(OH)2 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(2)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.97 Å. The Zn(1)-O(2) bond length is 1.99 Å. The Zn(1)-O(3) bond length is 2.03 Å. The Zn(1)-O(4) bond length is 1.94 Å. In the second Zn site, Zn(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with three equivalent Si(1)O4 tetrahedra and corners with four equivalent Zn(1)O4 tetrahedra. The Zn(2)-O(1) bond length is 1.99 Å. The Zn(2)-O(2) bond length is 1.98 Å. The Zn(2)-O(3) bond length is 2.00 Å. The Zn(2)-O(4) bond length is 1.96 Å. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and corners with three equivalent Zn(2)O4 tetrahedra. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(5) bond length is 1.65 Å. H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.98 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one Si(1) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one H(1) atom.