DyCuGa3 crystallizes in the tetragonal I-4m2 space group. Dy(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. Cu(1) is bonded to four equivalent Dy(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted CuDy4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, corners with twelve equivalent Cu(1)Dy4Ga8 cuboctahedra, edges with two equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, faces with four equivalent Cu(1)Dy4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded to four equivalent Dy(1), four equivalent Cu(1), and four equivalent Ga(1) atoms to form GaDy4Ga4Cu4 cuboctahedra that share corners with four equivalent Cu(1)Dy4Ga8 cuboctahedra, corners with twelve equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, edges with two equivalent Cu(1)Dy4Ga8 cuboctahedra, faces with four equivalent Cu(1)Dy4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra.
DyCuGa3 crystallizes in the tetragonal I-4m2 space group. Dy(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Ga(2), and eight equivalent Ga(1) atoms. All Dy(1)-Cu(1) bond lengths are 3.34 Å. All Dy(1)-Ga(2) bond lengths are 3.34 Å. All Dy(1)-Ga(1) bond lengths are 3.10 Å. Cu(1) is bonded to four equivalent Dy(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted CuDy4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, corners with twelve equivalent Cu(1)Dy4Ga8 cuboctahedra, edges with two equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, faces with four equivalent Cu(1)Dy4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra. All Cu(1)-Ga(1) bond lengths are 2.49 Å. All Cu(1)-Ga(2) bond lengths are 2.86 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. The Ga(1)-Ga(1) bond length is 2.42 Å. Both Ga(1)-Ga(2) bond lengths are 2.49 Å. In the second Ga site, Ga(2) is bonded to four equivalent Dy(1), four equivalent Cu(1), and four equivalent Ga(1) atoms to form GaDy4Ga4Cu4 cuboctahedra that share corners with four equivalent Cu(1)Dy4Ga8 cuboctahedra, corners with twelve equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra, edges with two equivalent Cu(1)Dy4Ga8 cuboctahedra, faces with four equivalent Cu(1)Dy4Ga8 cuboctahedra, and faces with four equivalent Ga(2)Dy4Ga4Cu4 cuboctahedra.