K2TeO4 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 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), 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 Te(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. Te(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form TeO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-65°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Te(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 Te(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 Te(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent K(2), and one Te(1) atom to form distorted corner-sharing OK4Te trigonal bipyramids.
K2TeO4 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 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms. The K(1)-O(2) bond length is 2.62 Å. The K(1)-O(3) bond length is 2.82 Å. There is one shorter (2.73 Å) and one longer (2.97 Å) K(1)-O(1) bond length. There is one shorter (3.02 Å) and one longer (3.11 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 Te(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. The K(2)-O(1) bond length is 2.69 Å. The K(2)-O(2) bond length is 2.74 Å. There is one shorter (2.76 Å) and one longer (2.80 Å) K(2)-O(3) bond length. There is one shorter (2.72 Å) and one longer (2.76 Å) K(2)-O(4) bond length. Te(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form TeO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-65°. The Te(1)-O(1) bond length is 1.82 Å. The Te(1)-O(2) bond length is 1.82 Å. The Te(1)-O(3) bond length is 1.83 Å. The Te(1)-O(4) bond length is 1.83 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Te(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 Te(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 Te(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), two equivalent K(2), and one Te(1) atom to form distorted corner-sharing OK4Te trigonal bipyramids.