CaZnSiH2O5 crystallizes in the monoclinic Cc space group. Ca(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. Zn(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four 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(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Ca(1), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), two equivalent Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Zn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Si(1), and one H(2) atom.
CaZnSiH2O5 crystallizes in the monoclinic Cc space group. Ca(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. The Ca(1)-O(2) bond length is 2.43 Å. The Ca(1)-O(3) bond length is 2.78 Å. The Ca(1)-O(4) bond length is 2.33 Å. There is one shorter (2.46 Å) and one longer (2.49 Å) Ca(1)-O(1) bond length. There is one shorter (2.36 Å) and one longer (2.38 Å) Ca(1)-O(5) bond length. Zn(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. The Zn(1)-O(2) bond length is 1.99 Å. The Zn(1)-O(4) bond length is 1.97 Å. Both Zn(1)-O(3) bond lengths are 2.00 Å. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.68 Å. The Si(1)-O(4) bond length is 1.64 Å. The Si(1)-O(5) bond length is 1.64 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 1.00 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(5) atom. The H(2)-O(1) bond length is 1.02 Å. The H(2)-O(5) bond length is 1.69 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Ca(1), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), two equivalent Zn(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Zn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Si(1), and one H(2) atom.