Ti9SnO20 is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. In the second Ti site, Ti(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with three equivalent Ti(5)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra,  an edgeedge with one Ti(4)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the third Ti site, Ti(3) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the fourth Ti site, Ti(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fifth Ti site, Ti(5) is bonded to one O(3), one O(5), two equivalent O(7), and two equivalent O(8) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with three equivalent Ti(2)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. Sn(1) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with four equivalent Ti(5)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted trigonal planar geometry to one Ti(4) and two equivalent Ti(5) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(4) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(3) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(5) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(3), and one Sn(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(4), and one Ti(5) atom. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Ti(3) and two equivalent Ti(4) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ti(5), and one Sn(1) atom.
Ti9SnO20 is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. The Ti(1)-O(2) bond length is 1.98 Å. The Ti(1)-O(3) bond length is 1.95 Å. The Ti(1)-O(4) bond length is 1.98 Å. The Ti(1)-O(5) bond length is 1.94 Å. Both Ti(1)-O(1) bond lengths are 2.02 Å. In the second Ti site, Ti(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with three equivalent Ti(5)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra,  an edgeedge with one Ti(4)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. The Ti(2)-O(2) bond length is 2.02 Å. The Ti(2)-O(3) bond length is 2.03 Å. Both Ti(2)-O(1) bond lengths are 1.94 Å. Both Ti(2)-O(7) bond lengths are 1.99 Å. In the third Ti site, Ti(3) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. Both Ti(3)-O(2) bond lengths are 1.98 Å. Both Ti(3)-O(4) bond lengths are 1.94 Å. Both Ti(3)-O(6) bond lengths are 2.02 Å. In the fourth Ti site, Ti(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. The Ti(4)-O(5) bond length is 1.99 Å. The Ti(4)-O(8) bond length is 2.03 Å. Both Ti(4)-O(1) bond lengths are 1.98 Å. Both Ti(4)-O(6) bond lengths are 1.96 Å. In the fifth Ti site, Ti(5) is bonded to one O(3), one O(5), two equivalent O(7), and two equivalent O(8) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with three equivalent Ti(2)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. The Ti(5)-O(3) bond length is 1.98 Å. The Ti(5)-O(5) bond length is 2.01 Å. Both Ti(5)-O(7) bond lengths are 1.98 Å. There is one shorter (1.96 Å) and one longer (1.98 Å) Ti(5)-O(8) bond length. Sn(1) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with four equivalent Ti(5)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. Both Sn(1)-O(4) bond lengths are 2.07 Å. All Sn(1)-O(7) bond lengths are 2.07 Å. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted trigonal planar geometry to one Ti(4) and two equivalent Ti(5) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(4) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(3) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(5) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(3), and one Sn(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(4), and one Ti(5) atom. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Ti(3) and two equivalent Ti(4) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ti(5), and one Sn(1) atom.