K2NaS2O6Cl crystallizes in the tetragonal P4/n space group. K(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), one Cl(1), and one Cl(2) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent O(2) and two equivalent Cl(1) atoms to form corner-sharing NaCl2O4 octahedra. The corner-sharing octahedra are not tilted. In the second Na site, Na(2) is bonded to four equivalent O(1) and two equivalent Cl(2) atoms to form distorted corner-sharing NaCl2O4 octahedra. The corner-sharing octahedra are not tilted. S(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Na(2), and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Na(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent K(1) and one S(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to four equivalent K(1) and two equivalent Na(1) atoms to form distorted corner-sharing ClK4Na2 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. In the second Cl site, Cl(2) is bonded to four equivalent K(1) and two equivalent Na(2) atoms to form corner-sharing ClK4Na2 octahedra. The corner-sharing octahedral tilt angles range from 0-27°.
K2NaS2O6Cl crystallizes in the tetragonal P4/n space group. K(1) is bonded in a 8-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), one Cl(1), and one Cl(2) atom. The K(1)-O(1) bond length is 3.02 Å. There is one shorter (3.04 Å) and one longer (3.11 Å) K(1)-O(2) bond length. There are a spread of K(1)-O(3) bond distances ranging from 2.83-3.03 Å. The K(1)-Cl(1) bond length is 3.18 Å. The K(1)-Cl(2) bond length is 3.16 Å. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent O(2) and two equivalent Cl(1) atoms to form corner-sharing NaCl2O4 octahedra. The corner-sharing octahedra are not tilted. All Na(1)-O(2) bond lengths are 2.54 Å. There is one shorter (2.79 Å) and one longer (2.88 Å) Na(1)-Cl(1) bond length. In the second Na site, Na(2) is bonded to four equivalent O(1) and two equivalent Cl(2) atoms to form distorted corner-sharing NaCl2O4 octahedra. The corner-sharing octahedra are not tilted. All Na(2)-O(1) bond lengths are 2.41 Å. Both Na(2)-Cl(2) bond lengths are 2.84 Å. S(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The S(1)-O(1) bond length is 1.47 Å. The S(1)-O(2) bond length is 1.47 Å. The S(1)-O(3) bond length is 1.47 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Na(2), and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Na(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent K(1) and one S(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to four equivalent K(1) and two equivalent Na(1) atoms to form distorted corner-sharing ClK4Na2 octahedra. The corner-sharing octahedral tilt angles range from 0-27°. In the second Cl site, Cl(2) is bonded to four equivalent K(1) and two equivalent Na(2) atoms to form corner-sharing ClK4Na2 octahedra. The corner-sharing octahedral tilt angles range from 0-27°.