W9Zn2O13 crystallizes in the triclinic P-1 space group. There are five inequivalent W sites. In the first W site, W(1) is bonded in a square co-planar geometry to four equivalent O(7) atoms. In the second W site, W(2) is bonded in a 4-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(3) atoms. In the third W site, W(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(7) atoms. In the fourth W site, W(4) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. In the fifth W site, W(5) is bonded to one O(2), one O(7), two equivalent O(5), and two equivalent O(6) atoms to form distorted WO6 octahedra that share corners with two equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent W(5)O6 octahedra, and edges with two equivalent Zn(1)O5 trigonal bipyramids. Zn(1) is bonded to one O(3), one O(5), one O(6), and two equivalent O(2) atoms to form distorted ZnO5 trigonal bipyramids that share corners with two equivalent W(5)O6 octahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent W(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-71°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent W(4) and four equivalent W(2) atoms to form distorted OW6 octahedra that share corners with two equivalent O(2)Zn2W2 tetrahedra, corners with eight equivalent O(3)ZnW4 trigonal bipyramids, edges with two equivalent O(1)W6 octahedra, and edges with two equivalent O(3)ZnW4 trigonal bipyramids. In the second O site, O(2) is bonded to one W(4), one W(5), and two equivalent Zn(1) atoms to form OZn2W2 tetrahedra that share  a cornercorner with one O(1)W6 octahedra,  a cornercorner with one O(7)W5 square pyramid, corners with two equivalent O(2)Zn2W2 tetrahedra, edges with two equivalent O(3)ZnW4 trigonal bipyramids, and edges with two equivalent O(6)ZnW4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 18°. In the third O site, O(3) is bonded to two equivalent W(2), two equivalent W(4), and one Zn(1) atom to form distorted OZnW4 trigonal bipyramids that share corners with four equivalent O(1)W6 octahedra,  a cornercorner with one O(6)ZnW4 trigonal bipyramid,  an edgeedge with one O(1)W6 octahedra, edges with two equivalent O(2)Zn2W2 tetrahedra, and edges with two equivalent O(3)ZnW4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 15-66°. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one W(2) and two equivalent W(4) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent W(5) and one Zn(1) atom. In the sixth O site, O(6) is bonded to two equivalent W(3), two equivalent W(5), and one Zn(1) atom to form distorted OZnW4 trigonal bipyramids that share corners with six equivalent O(7)W5 square pyramids,  a cornercorner with one O(3)ZnW4 trigonal bipyramid, edges with two equivalent O(2)Zn2W2 tetrahedra, and edges with two equivalent O(6)ZnW4 trigonal bipyramids. In the seventh O site, O(7) is bonded to one W(5), two equivalent W(1), and two equivalent W(3) atoms to form distorted OW5 square pyramids that share corners with four equivalent O(7)W5 square pyramids,  a cornercorner with one O(2)Zn2W2 tetrahedra, corners with six equivalent O(6)ZnW4 trigonal bipyramids, and edges with two equivalent O(7)W5 square pyramids.
W9Zn2O13 crystallizes in the triclinic P-1 space group. There are five inequivalent W sites. In the first W site, W(1) is bonded in a square co-planar geometry to four equivalent O(7) atoms. There are two shorter (2.18 Å) and two longer (2.34 Å) W(1)-O(7) bond lengths. In the second W site, W(2) is bonded in a 4-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(3) atoms. The W(2)-O(4) bond length is 2.14 Å. There is one shorter (2.21 Å) and one longer (2.77 Å) W(2)-O(1) bond length. There is one shorter (2.20 Å) and one longer (2.29 Å) W(2)-O(3) bond length. In the third W site, W(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(7) atoms. There is one shorter (2.24 Å) and one longer (2.30 Å) W(3)-O(6) bond length. There is one shorter (2.26 Å) and one longer (2.38 Å) W(3)-O(7) bond length. In the fourth W site, W(4) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. The W(4)-O(1) bond length is 2.45 Å. The W(4)-O(2) bond length is 2.09 Å. There is one shorter (2.20 Å) and one longer (2.33 Å) W(4)-O(3) bond length. There is one shorter (2.04 Å) and one longer (2.07 Å) W(4)-O(4) bond length. In the fifth W site, W(5) is bonded to one O(2), one O(7), two equivalent O(5), and two equivalent O(6) atoms to form distorted WO6 octahedra that share corners with two equivalent Zn(1)O5 trigonal bipyramids, edges with two equivalent W(5)O6 octahedra, and edges with two equivalent Zn(1)O5 trigonal bipyramids. The W(5)-O(2) bond length is 2.17 Å. The W(5)-O(7) bond length is 2.47 Å. There is one shorter (2.08 Å) and one longer (2.10 Å) W(5)-O(5) bond length. There is one shorter (2.31 Å) and one longer (2.33 Å) W(5)-O(6) bond length. Zn(1) is bonded to one O(3), one O(5), one O(6), and two equivalent O(2) atoms to form distorted ZnO5 trigonal bipyramids that share corners with two equivalent W(5)O6 octahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent W(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-71°. The Zn(1)-O(3) bond length is 2.31 Å. The Zn(1)-O(5) bond length is 1.95 Å. The Zn(1)-O(6) bond length is 2.16 Å. There is one shorter (2.04 Å) and one longer (2.08 Å) Zn(1)-O(2) bond length. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent W(4) and four equivalent W(2) atoms to form distorted OW6 octahedra that share corners with two equivalent O(2)Zn2W2 tetrahedra, corners with eight equivalent O(3)ZnW4 trigonal bipyramids, edges with two equivalent O(1)W6 octahedra, and edges with two equivalent O(3)ZnW4 trigonal bipyramids. In the second O site, O(2) is bonded to one W(4), one W(5), and two equivalent Zn(1) atoms to form OZn2W2 tetrahedra that share  a cornercorner with one O(1)W6 octahedra,  a cornercorner with one O(7)W5 square pyramid, corners with two equivalent O(2)Zn2W2 tetrahedra, edges with two equivalent O(3)ZnW4 trigonal bipyramids, and edges with two equivalent O(6)ZnW4 trigonal bipyramids. The corner-sharing octahedral tilt angles are 18°. In the third O site, O(3) is bonded to two equivalent W(2), two equivalent W(4), and one Zn(1) atom to form distorted OZnW4 trigonal bipyramids that share corners with four equivalent O(1)W6 octahedra,  a cornercorner with one O(6)ZnW4 trigonal bipyramid,  an edgeedge with one O(1)W6 octahedra, edges with two equivalent O(2)Zn2W2 tetrahedra, and edges with two equivalent O(3)ZnW4 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 15-66°. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one W(2) and two equivalent W(4) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to two equivalent W(5) and one Zn(1) atom. In the sixth O site, O(6) is bonded to two equivalent W(3), two equivalent W(5), and one Zn(1) atom to form distorted OZnW4 trigonal bipyramids that share corners with six equivalent O(7)W5 square pyramids,  a cornercorner with one O(3)ZnW4 trigonal bipyramid, edges with two equivalent O(2)Zn2W2 tetrahedra, and edges with two equivalent O(6)ZnW4 trigonal bipyramids. In the seventh O site, O(7) is bonded to one W(5), two equivalent W(1), and two equivalent W(3) atoms to form distorted OW5 square pyramids that share corners with four equivalent O(7)W5 square pyramids,  a cornercorner with one O(2)Zn2W2 tetrahedra, corners with six equivalent O(6)ZnW4 trigonal bipyramids, and edges with two equivalent O(7)W5 square pyramids.