(YNi3(SeO4)2)2Cl2 crystallizes in the orthorhombic Pmmn space group. The structure consists of two hydrochloric acid atoms inside a YNi3(SeO4)2 framework. In the YNi3(SeO4)2 framework, 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 Ni sites. In the first Ni site, Ni(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. In the second Ni site, Ni(2) is bonded in a rectangular see-saw-like 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 Ni(2), and two equivalent Ni(1) atoms to form a mixture of corner and edge-sharing OYNi3 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Ni(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 Ni(1), and one Se(1) atom.
(YNi3(SeO4)2)2Cl2 crystallizes in the orthorhombic Pmmn space group. The structure consists of two hydrochloric acid atoms inside a YNi3(SeO4)2 framework. In the YNi3(SeO4)2 framework, 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 2.29 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 Ni sites. In the first Ni site, Ni(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. Both Ni(1)-O(1) bond lengths are 1.94 Å. Both Ni(1)-O(3) bond lengths are 2.06 Å. In the second Ni site, Ni(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Ni(2)-O(1) bond lengths are 1.96 Å. Both Ni(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 1.73 Å. Both Se(1)-O(3) bond lengths are 1.73 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Y(1), one Ni(2), and two equivalent Ni(1) atoms to form a mixture of corner and edge-sharing OYNi3 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Ni(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 Ni(1), and one Se(1) atom.