K2Zn3(SeO3)4 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(5), and one O(6) atom. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Zn(1), and one Se(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(1), one Zn(1), one Zn(2), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Zn(2), and one Se(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Zn(1), and one Se(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one Se(2) atom.
K2Zn3(SeO3)4 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and two equivalent O(5) atoms. The K(1)-O(1) bond length is 2.83 Å. The K(1)-O(2) bond length is 2.98 Å. The K(1)-O(3) bond length is 2.98 Å. The K(1)-O(4) bond length is 2.75 Å. The K(1)-O(6) bond length is 2.86 Å. There is one shorter (2.76 Å) and one longer (3.14 Å) K(1)-O(5) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(5), and one O(6) atom. The Zn(1)-O(2) bond length is 1.97 Å. The Zn(1)-O(3) bond length is 1.99 Å. The Zn(1)-O(5) bond length is 1.99 Å. The Zn(1)-O(6) bond length is 2.01 Å. In the second Zn site, Zn(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Both Zn(2)-O(1) bond lengths are 2.09 Å. Both Zn(2)-O(3) bond lengths are 2.46 Å. Both Zn(2)-O(4) bond lengths are 2.07 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The Se(1)-O(1) bond length is 1.72 Å. The Se(1)-O(2) bond length is 1.74 Å. The Se(1)-O(3) bond length is 1.75 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. The Se(2)-O(4) bond length is 1.73 Å. The Se(2)-O(5) bond length is 1.74 Å. The Se(2)-O(6) bond length is 1.74 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Zn(1), and one Se(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(1), one Zn(1), one Zn(2), and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Zn(2), and one Se(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Zn(1), and one Se(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one Se(2) atom.