DyCuTe2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form distorted DyTe6 octahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Dy(1)Te6 octahedra, edges with four equivalent Dy(2)Te6 octahedra, and edges with four equivalent Cu(1)Te4 tetrahedra. In the second Dy site, Dy(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted DyTe6 octahedra that share corners with eight equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Dy(2)Te6 octahedra, edges with four equivalent Dy(1)Te6 octahedra, and edges with two equivalent Cu(1)Te4 tetrahedra. Cu(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form distorted CuTe4 tetrahedra that share corners with two equivalent Dy(1)Te6 octahedra, corners with four equivalent Dy(2)Te6 octahedra, corners with two equivalent Cu(1)Te4 tetrahedra,  an edgeedge with one Dy(2)Te6 octahedra, edges with two equivalent Dy(1)Te6 octahedra, and  an edgeedge with one Cu(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-56°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Dy(2), two equivalent Dy(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing TeDy3Cu2 square pyramids. In the second Te site, Te(2) is bonded to one Dy(1), two equivalent Dy(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing TeDy3Cu2 square pyramids.
DyCuTe2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form distorted DyTe6 octahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Dy(1)Te6 octahedra, edges with four equivalent Dy(2)Te6 octahedra, and edges with four equivalent Cu(1)Te4 tetrahedra. Both Dy(1)-Te(2) bond lengths are 3.11 Å. All Dy(1)-Te(1) bond lengths are 3.09 Å. In the second Dy site, Dy(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted DyTe6 octahedra that share corners with eight equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Dy(2)Te6 octahedra, edges with four equivalent Dy(1)Te6 octahedra, and edges with two equivalent Cu(1)Te4 tetrahedra. Both Dy(2)-Te(1) bond lengths are 3.05 Å. All Dy(2)-Te(2) bond lengths are 3.07 Å. Cu(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form distorted CuTe4 tetrahedra that share corners with two equivalent Dy(1)Te6 octahedra, corners with four equivalent Dy(2)Te6 octahedra, corners with two equivalent Cu(1)Te4 tetrahedra,  an edgeedge with one Dy(2)Te6 octahedra, edges with two equivalent Dy(1)Te6 octahedra, and  an edgeedge with one Cu(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-56°. There is one shorter (2.59 Å) and one longer (2.66 Å) Cu(1)-Te(1) bond length. Both Cu(1)-Te(2) bond lengths are 2.60 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Dy(2), two equivalent Dy(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing TeDy3Cu2 square pyramids. In the second Te site, Te(2) is bonded to one Dy(1), two equivalent Dy(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing TeDy3Cu2 square pyramids.