RbYSeO3Cl2 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent Cl(2), and three equivalent Cl(1) atoms. Y(1) is bonded to one O(3), two equivalent O(1), two equivalent O(2), one Cl(1), and one Cl(2) atom to form edge-sharing YCl2O5 pentagonal bipyramids. Se(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 distorted trigonal non-coplanar geometry to two equivalent Y(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Rb(1), one Y(1), and one Se(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted see-saw-like geometry to three equivalent Rb(1) and one Y(1) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(1) and one Y(1) atom.
RbYSeO3Cl2 crystallizes in the triclinic P-1 space group. Rb(1) is bonded in a 6-coordinate geometry to one O(3), two equivalent Cl(2), and three equivalent Cl(1) atoms. The Rb(1)-O(3) bond length is 3.04 Å. There is one shorter (3.36 Å) and one longer (3.51 Å) Rb(1)-Cl(2) bond length. There are a spread of Rb(1)-Cl(1) bond distances ranging from 3.37-3.48 Å. Y(1) is bonded to one O(3), two equivalent O(1), two equivalent O(2), one Cl(1), and one Cl(2) atom to form edge-sharing YCl2O5 pentagonal bipyramids. The Y(1)-O(3) bond length is 2.32 Å. There is one shorter (2.33 Å) and one longer (2.41 Å) Y(1)-O(1) bond length. There is one shorter (2.32 Å) and one longer (2.45 Å) Y(1)-O(2) bond length. The Y(1)-Cl(1) bond length is 2.68 Å. The Y(1)-Cl(2) bond length is 2.66 Å. 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 1.74 Å. The Se(1)-O(2) bond length is 1.74 Å. The Se(1)-O(3) bond length is 1.71 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Y(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Y(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Rb(1), one Y(1), and one Se(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted see-saw-like geometry to three equivalent Rb(1) and one Y(1) atom. In the second Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Rb(1) and one Y(1) atom.