(NdCu3(SeO4)2)2Cl2 crystallizes in the orthorhombic Pmmn space group. The structure consists of two hydrochloric acid atoms inside a NdCu3(SeO4)2 framework. In the NdCu3(SeO4)2 framework, Nd(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nd(1), one Cu(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nd(1), one Cu(1), and one Se(1) atom. In the third O site, O(3) is bonded to one Nd(1), one Cu(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing ONdCu3 tetrahedra.
(NdCu3(SeO4)2)2Cl2 crystallizes in the orthorhombic Pmmn space group. The structure consists of two hydrochloric acid atoms inside a NdCu3(SeO4)2 framework. In the NdCu3(SeO4)2 framework, Nd(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Both Nd(1)-O(1) bond lengths are 2.58 Å. Both Nd(1)-O(3) bond lengths are 2.40 Å. All Nd(1)-O(2) bond lengths are 2.46 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. Both Cu(1)-O(2) bond lengths are 2.02 Å. Both Cu(1)-O(3) bond lengths are 1.94 Å. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(3) atoms. Both Cu(2)-O(1) bond lengths are 2.01 Å. Both Cu(2)-O(3) bond lengths are 1.94 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1) and two equivalent O(2) atoms. The Se(1)-O(1) bond length is 1.73 Å. Both Se(1)-O(2) bond lengths are 1.74 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nd(1), one Cu(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nd(1), one Cu(1), and one Se(1) atom. In the third O site, O(3) is bonded to one Nd(1), one Cu(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing ONdCu3 tetrahedra.