K2Zn(SeO5)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Zn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with four equivalent Se(1)O4 tetrahedra. Se(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SeO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-56°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Se(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Zn(1), and one Se(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), one Zn(1), and one Se(1) atom to form a mixture of distorted edge and corner-sharing OK2ZnSe tetrahedra. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom.
K2Zn(SeO5)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. The K(1)-O(3) bond length is 2.94 Å. The K(1)-O(5) bond length is 2.96 Å. There is one shorter (2.79 Å) and one longer (2.82 Å) K(1)-O(1) bond length. There is one shorter (2.95 Å) and one longer (3.14 Å) K(1)-O(2) bond length. There is one shorter (2.89 Å) and one longer (2.95 Å) K(1)-O(4) bond length. Zn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with four equivalent Se(1)O4 tetrahedra. Both Zn(1)-O(3) bond lengths are 2.11 Å. Both Zn(1)-O(4) bond lengths are 2.11 Å. Both Zn(1)-O(5) bond lengths are 1.94 Å. Se(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SeO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-56°. The Se(1)-O(1) bond length is 1.67 Å. The Se(1)-O(2) bond length is 1.66 Å. The Se(1)-O(3) bond length is 1.70 Å. The Se(1)-O(4) bond length is 1.70 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Se(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one Zn(1), and one Se(1) atom. In the fourth O site, O(4) is bonded to two equivalent K(1), one Zn(1), and one Se(1) atom to form a mixture of distorted edge and corner-sharing OK2ZnSe tetrahedra. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one Zn(1) atom.