K6W2N4O3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded to one N(1), two equivalent N(2), and two equivalent O(2) atoms to form distorted KN3O2 square pyramids that share corners with three equivalent W(1)N2O2 tetrahedra, edges with two equivalent K(1)N3O2 square pyramids, and  an edgeedge with one W(1)N2O2 tetrahedra. In the second K site, K(2) is bonded in a 5-coordinate geometry to one N(2), two equivalent N(1), one O(1), and one O(2) atom. In the third K site, K(3) is bonded in a 6-coordinate geometry to one N(1), two equivalent N(2), one O(1), and two equivalent O(2) atoms. W(1) is bonded to one N(1), one N(2), one O(1), and one O(2) atom to form WN2O2 tetrahedra that share corners with three equivalent K(1)N3O2 square pyramids,  a cornercorner with one W(1)N2O2 tetrahedra, and  an edgeedge with one K(1)N3O2 square pyramid. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one W(1) atom. In the second N site, N(2) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and one W(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted octahedral geometry to two equivalent K(2), two equivalent K(3), and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and one W(1) atom.
K6W2N4O3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded to one N(1), two equivalent N(2), and two equivalent O(2) atoms to form distorted KN3O2 square pyramids that share corners with three equivalent W(1)N2O2 tetrahedra, edges with two equivalent K(1)N3O2 square pyramids, and  an edgeedge with one W(1)N2O2 tetrahedra. The K(1)-N(1) bond length is 3.09 Å. There is one shorter (2.75 Å) and one longer (2.82 Å) K(1)-N(2) bond length. There is one shorter (2.78 Å) and one longer (2.79 Å) K(1)-O(2) bond length. In the second K site, K(2) is bonded in a 5-coordinate geometry to one N(2), two equivalent N(1), one O(1), and one O(2) atom. The K(2)-N(2) bond length is 2.99 Å. There is one shorter (2.82 Å) and one longer (3.28 Å) K(2)-N(1) bond length. The K(2)-O(1) bond length is 3.12 Å. The K(2)-O(2) bond length is 2.94 Å. In the third K site, K(3) is bonded in a 6-coordinate geometry to one N(1), two equivalent N(2), one O(1), and two equivalent O(2) atoms. The K(3)-N(1) bond length is 2.78 Å. There is one shorter (2.84 Å) and one longer (3.27 Å) K(3)-N(2) bond length. The K(3)-O(1) bond length is 3.08 Å. There is one shorter (2.92 Å) and one longer (3.16 Å) K(3)-O(2) bond length. W(1) is bonded to one N(1), one N(2), one O(1), and one O(2) atom to form WN2O2 tetrahedra that share corners with three equivalent K(1)N3O2 square pyramids,  a cornercorner with one W(1)N2O2 tetrahedra, and  an edgeedge with one K(1)N3O2 square pyramid. The W(1)-N(1) bond length is 1.84 Å. The W(1)-N(2) bond length is 1.82 Å. The W(1)-O(1) bond length is 1.97 Å. The W(1)-O(2) bond length is 1.89 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one W(1) atom. In the second N site, N(2) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and one W(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted octahedral geometry to two equivalent K(2), two equivalent K(3), and two equivalent W(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), two equivalent K(3), and one W(1) atom.