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DyCu is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Dy is bonded in a body-centered cubic geometry to eight equivalent Cu atoms. All Dy–Cu bond lengths are 3.00 Å. Cu is bonded in a body-centered cubic geometry to eight equivalent Dy atoms.
DyCu5 crystallizes in the cubic F-43m space group. The structure is three-dimensional. Dy is bonded in a 12-coordinate geometry to sixteen Cu atoms. There are twelve shorter (2.91 Å) and four longer (3.04 Å) Dy–Cu bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded to four equivalent Dy and twelve equivalent Cu atoms to form distorted CuDy4Cu12 tetrahedra that share corners with twelve equivalent CuDy3Cu9 cuboctahedra, faces with twenty-eight equivalent CuDy3Cu9 cuboctahedra, and faces with twelve equivalent CuDy4Cu12 tetrahedra. All Cu–Cu bond lengths are 2.91 Å. In the second Cu site, Cu is bonded to three equivalent Dy and nine Cu atoms to form distorted CuDy3Cu9 cuboctahedra that share corners with eighteen equivalent CuDy3Cu9 cuboctahedra, corners with three equivalent CuDy4Cu12 tetrahedra, edges with six equivalent CuDy3Cu9 cuboctahedra, faces with eighteen equivalent CuDy3Cu9 cuboctahedra, and faces with seven equivalent CuDy4Cu12 tetrahedra. There are three shorter (2.46 Å) and three longer (2.51 Å) Cu–Cu bond lengths.
DyCu5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Dy is bonded in a distorted hexagonal planar geometry to eighteen Cu atoms. There are six shorter (2.88 Å) and twelve longer (3.24 Å) Dy–Cu bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded to three equivalent Dy and nine Cu atoms to form a mixture of distorted edge, face, and corner-sharing CuDy3Cu9 cuboctahedra. There are six shorter (2.52 Å) and three longer (2.88 Å) Cu–Cu bond lengths. In the second Cu site, Cu is bonded to four equivalent Dy and eight Cu atoms to form CuDy4Cu8 cuboctahedra that share corners with twenty-four CuDy3Cu9 cuboctahedra, edges with ten equivalent CuDy4Cu8 cuboctahedra, and faces with twenty-two CuDy3Cu9 cuboctahedra. All Cu–Cu bond lengths are 2.50 Å.
Dy6Cu23 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Dy is bonded in a 12-coordinate geometry to twelve Cu atoms. There are a spread of Dy–Cu bond distances ranging from 2.89–3.07 Å. There are four inequivalent Cu sites. In the first Cu site, Cu is bonded in a 12-coordinate geometry to three equivalent Dy and nine Cu atoms. There are a spread of Cu–Cu bond distances ranging from 2.48–2.65 Å. In the second Cu site, Cu is bonded in a body-centered cubic geometry to eight equivalent Cu atoms. All Cu–Cu bond lengths are 2.56 Å. In the third Cu site, Cu is bonded to four equivalent Dy and eight Cu atoms to form a mixture of corner and face-sharing CuDy4Cu8 cuboctahedra. All Cu–Cu bond lengths are 2.65 Å. In the fourth Cu site, Cu is bonded in a 3-coordinate geometry to three equivalent Dy and ten Cu atoms. All Cu–Cu bond lengths are 2.95 Å.