WO2 crystallizes in the triclinic P1 space group. There are twelve inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(4)O6 octahedra, and edges with two equivalent W(6)O6 octahedra. In the second W site, W(2) is bonded to one O(10), one O(15), one O(16), one O(20), one O(5), and one O(9) atom to form distorted edge-sharing WO6 octahedra. In the third W site, W(3) is bonded to one O(11), one O(12), one O(5), one O(6), one O(8), and one O(9) atom to form edge-sharing WO6 octahedra. In the fourth W site, W(4) is bonded to one O(1), one O(12), one O(3), one O(4), one O(6), and one O(7) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(6)O6 octahedra. In the fifth W site, W(5) is bonded to one O(10), one O(11), one O(14), one O(15), one O(16), and one O(9) atom to form edge-sharing WO6 octahedra. In the sixth W site, W(6) is bonded to one O(1), one O(12), one O(2), one O(3), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(4)O6 octahedra. In the seventh W site, W(7) is bonded to one O(13), one O(14), one O(16), one O(18), one O(19), and one O(20) atom to form edge-sharing WO6 octahedra. In the eighth W site, W(8) is bonded to one O(10), one O(11), one O(14), one O(15), one O(20), and one O(5) atom to form edge-sharing WO6 octahedra. In the ninth W site, W(9) is bonded to one O(17), one O(18), one O(19), one O(21), one O(22), and one O(23) atom to form WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(10)O6 octahedra, and edges with two equivalent W(11)O6 octahedra. In the tenth W site, W(10) is bonded to one O(13), one O(17), one O(19), one O(21), one O(23), and one O(24) atom to form distorted WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(11)O6 octahedra, and edges with two equivalent W(9)O6 octahedra. In the eleventh W site, W(11) is bonded to one O(13), one O(17), one O(18), one O(22), one O(23), and one O(24) atom to form WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(10)O6 octahedra, and edges with two equivalent W(9)O6 octahedra. In the twelfth W site, W(12) is bonded to one O(21), one O(22), one O(24), and one O(7) atom to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-61°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one W(4) and one W(6) atom. In the second O site, O(2) is bonded in a water-like geometry to one W(1) and one W(6) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one W(1), one W(4), and one W(6) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one W(1) and one W(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(3), and one W(8) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one W(1), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one W(1), one W(12), one W(4), and one W(6) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one W(1), one W(3), and one W(6) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(3), and one W(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(5), and one W(8) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one W(3), one W(5), and one W(8) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one W(3), one W(4), and one W(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(11), and one W(7) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one W(5), one W(7), and one W(8) atom. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one W(2), one W(5), and one W(8) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(5), and one W(7) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(11), and one W(9) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one W(11), one W(7), and one W(9) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(7), and one W(9) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(7), and one W(8) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one W(10), one W(12), and one W(9) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one W(11), one W(12), and one W(9) atom. In the twenty-third O site, O(23) is bonded in a trigonal non-coplanar geometry to one W(10), one W(11), and one W(9) atom. In the twenty-fourth O site, O(24) is bonded in a trigonal planar geometry to one W(10), one W(11), and one W(12) atom.
WO2 crystallizes in the triclinic P1 space group. There are twelve inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(4)O6 octahedra, and edges with two equivalent W(6)O6 octahedra. The W(1)-O(2) bond length is 2.00 Å. The W(1)-O(3) bond length is 2.14 Å. The W(1)-O(4) bond length is 2.02 Å. The W(1)-O(6) bond length is 2.12 Å. The W(1)-O(7) bond length is 2.32 Å. The W(1)-O(8) bond length is 2.14 Å. In the second W site, W(2) is bonded to one O(10), one O(15), one O(16), one O(20), one O(5), and one O(9) atom to form distorted edge-sharing WO6 octahedra. The W(2)-O(10) bond length is 2.22 Å. The W(2)-O(15) bond length is 2.19 Å. The W(2)-O(16) bond length is 2.24 Å. The W(2)-O(20) bond length is 2.25 Å. The W(2)-O(5) bond length is 2.18 Å. The W(2)-O(9) bond length is 2.20 Å. In the third W site, W(3) is bonded to one O(11), one O(12), one O(5), one O(6), one O(8), and one O(9) atom to form edge-sharing WO6 octahedra. The W(3)-O(11) bond length is 2.06 Å. The W(3)-O(12) bond length is 2.19 Å. The W(3)-O(5) bond length is 2.13 Å. The W(3)-O(6) bond length is 2.09 Å. The W(3)-O(8) bond length is 2.08 Å. The W(3)-O(9) bond length is 2.08 Å. In the fourth W site, W(4) is bonded to one O(1), one O(12), one O(3), one O(4), one O(6), and one O(7) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(6)O6 octahedra. The W(4)-O(1) bond length is 1.90 Å. The W(4)-O(12) bond length is 2.03 Å. The W(4)-O(3) bond length is 2.01 Å. The W(4)-O(4) bond length is 1.95 Å. The W(4)-O(6) bond length is 2.13 Å. The W(4)-O(7) bond length is 2.29 Å. In the fifth W site, W(5) is bonded to one O(10), one O(11), one O(14), one O(15), one O(16), and one O(9) atom to form edge-sharing WO6 octahedra. The W(5)-O(10) bond length is 2.07 Å. The W(5)-O(11) bond length is 2.16 Å. The W(5)-O(14) bond length is 2.18 Å. The W(5)-O(15) bond length is 2.08 Å. The W(5)-O(16) bond length is 2.12 Å. The W(5)-O(9) bond length is 2.07 Å. In the sixth W site, W(6) is bonded to one O(1), one O(12), one O(2), one O(3), one O(7), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one W(12)O4 tetrahedra,  an edgeedge with one W(3)O6 octahedra, edges with two equivalent W(1)O6 octahedra, and edges with two equivalent W(4)O6 octahedra. The W(6)-O(1) bond length is 2.06 Å. The W(6)-O(12) bond length is 2.12 Å. The W(6)-O(2) bond length is 1.98 Å. The W(6)-O(3) bond length is 2.15 Å. The W(6)-O(7) bond length is 2.31 Å. The W(6)-O(8) bond length is 2.10 Å. In the seventh W site, W(7) is bonded to one O(13), one O(14), one O(16), one O(18), one O(19), and one O(20) atom to form edge-sharing WO6 octahedra. The W(7)-O(13) bond length is 2.06 Å. The W(7)-O(14) bond length is 1.99 Å. The W(7)-O(16) bond length is 2.02 Å. The W(7)-O(18) bond length is 2.08 Å. The W(7)-O(19) bond length is 2.11 Å. The W(7)-O(20) bond length is 1.95 Å. In the eighth W site, W(8) is bonded to one O(10), one O(11), one O(14), one O(15), one O(20), and one O(5) atom to form edge-sharing WO6 octahedra. The W(8)-O(10) bond length is 2.07 Å. The W(8)-O(11) bond length is 2.14 Å. The W(8)-O(14) bond length is 2.21 Å. The W(8)-O(15) bond length is 2.06 Å. The W(8)-O(20) bond length is 2.17 Å. The W(8)-O(5) bond length is 2.02 Å. In the ninth W site, W(9) is bonded to one O(17), one O(18), one O(19), one O(21), one O(22), and one O(23) atom to form WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(10)O6 octahedra, and edges with two equivalent W(11)O6 octahedra. The W(9)-O(17) bond length is 2.09 Å. The W(9)-O(18) bond length is 2.12 Å. The W(9)-O(19) bond length is 2.04 Å. The W(9)-O(21) bond length is 2.15 Å. The W(9)-O(22) bond length is 2.19 Å. The W(9)-O(23) bond length is 2.04 Å. In the tenth W site, W(10) is bonded to one O(13), one O(17), one O(19), one O(21), one O(23), and one O(24) atom to form distorted WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(11)O6 octahedra, and edges with two equivalent W(9)O6 octahedra. The W(10)-O(13) bond length is 2.21 Å. The W(10)-O(17) bond length is 2.21 Å. The W(10)-O(19) bond length is 2.19 Å. The W(10)-O(21) bond length is 2.23 Å. The W(10)-O(23) bond length is 2.16 Å. The W(10)-O(24) bond length is 2.21 Å. In the eleventh W site, W(11) is bonded to one O(13), one O(17), one O(18), one O(22), one O(23), and one O(24) atom to form WO6 octahedra that share corners with two equivalent W(12)O4 tetrahedra,  an edgeedge with one W(7)O6 octahedra, edges with two equivalent W(10)O6 octahedra, and edges with two equivalent W(9)O6 octahedra. The W(11)-O(13) bond length is 2.05 Å. The W(11)-O(17) bond length is 2.07 Å. The W(11)-O(18) bond length is 2.13 Å. The W(11)-O(22) bond length is 2.20 Å. The W(11)-O(23) bond length is 2.04 Å. The W(11)-O(24) bond length is 2.15 Å. In the twelfth W site, W(12) is bonded to one O(21), one O(22), one O(24), and one O(7) atom to form corner-sharing WO4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-61°. The W(12)-O(21) bond length is 1.99 Å. The W(12)-O(22) bond length is 1.99 Å. The W(12)-O(24) bond length is 1.99 Å. The W(12)-O(7) bond length is 2.02 Å. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one W(4) and one W(6) atom. In the second O site, O(2) is bonded in a water-like geometry to one W(1) and one W(6) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one W(1), one W(4), and one W(6) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one W(1) and one W(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(3), and one W(8) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one W(1), one W(3), and one W(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one W(1), one W(12), one W(4), and one W(6) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one W(1), one W(3), and one W(6) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(3), and one W(5) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(5), and one W(8) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one W(3), one W(5), and one W(8) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one W(3), one W(4), and one W(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(11), and one W(7) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one W(5), one W(7), and one W(8) atom. In the fifteenth O site, O(15) is bonded in a trigonal non-coplanar geometry to one W(2), one W(5), and one W(8) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(5), and one W(7) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(11), and one W(9) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal non-coplanar geometry to one W(11), one W(7), and one W(9) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one W(10), one W(7), and one W(9) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one W(2), one W(7), and one W(8) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one W(10), one W(12), and one W(9) atom. In the twenty-second O site, O(22) is bonded in a distorted trigonal planar geometry to one W(11), one W(12), and one W(9) atom. In the twenty-third O site, O(23) is bonded in a trigonal non-coplanar geometry to one W(10), one W(11), and one W(9) atom. In the twenty-fourth O site, O(24) is bonded in a trigonal planar geometry to one W(10), one W(11), and one W(12) atom.