K2WO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. In the second K site, K(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form KO6 octahedra that share corners with six equivalent W(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. W(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form WO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-60°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one W(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent K(2), and one W(1) atom to form distorted corner-sharing OK4W trigonal bipyramids.
K2WO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), and two equivalent O(4) atoms. The K(1)-O(1) bond length is 2.65 Å. The K(1)-O(2) bond length is 2.65 Å. The K(1)-O(3) bond length is 2.81 Å. There is one shorter (2.97 Å) and one longer (3.07 Å) K(1)-O(4) bond length. In the second K site, K(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form KO6 octahedra that share corners with six equivalent W(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. The K(2)-O(1) bond length is 2.71 Å. The K(2)-O(2) bond length is 2.69 Å. There is one shorter (2.77 Å) and one longer (2.79 Å) K(2)-O(3) bond length. Both K(2)-O(4) bond lengths are 2.73 Å. W(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form WO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-60°. The W(1)-O(1) bond length is 1.78 Å. The W(1)-O(2) bond length is 1.78 Å. The W(1)-O(3) bond length is 1.80 Å. The W(1)-O(4) bond length is 1.80 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one W(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one W(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent K(2), and one W(1) atom to form distorted corner-sharing OK4W trigonal bipyramids.