YCo3Se2O8Cl crystallizes in the orthorhombic Pmmn space group. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent Cl(1) atoms. In the second Co site, Co(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Se(1) is bonded in a trigonal non-coplanar geometry to one O(2) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Co(2), and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing OYCo3 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Co(2), and one Se(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Co(1), and one Se(1) atom. Cl(1) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms.
YCo3Se2O8Cl crystallizes in the orthorhombic Pmmn space group. Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Y(1)-O(1) bond lengths are 2.31 Å. Both Y(1)-O(2) bond lengths are 2.59 Å. All Y(1)-O(3) bond lengths are 2.42 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(3), and two equivalent Cl(1) atoms. Both Co(1)-O(1) bond lengths are 1.94 Å. Both Co(1)-O(3) bond lengths are 2.11 Å. Both Co(1)-Cl(1) bond lengths are 3.07 Å. In the second Co site, Co(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Co(2)-O(1) bond lengths are 1.99 Å. Both Co(2)-O(2) bond lengths are 2.02 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one O(2) and two equivalent O(3) atoms. The Se(1)-O(2) bond length is 1.74 Å. Both Se(1)-O(3) bond lengths are 1.74 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Co(2), and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing OYCo3 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Co(2), and one Se(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Y(1), one Co(1), and one Se(1) atom. Cl(1) is bonded in a 4-coordinate geometry to four equivalent Co(1) atoms.