SmCu5 crystallizes in the hexagonal P6/mmm space group. Sm(1) is bonded in a 18-coordinate geometry to six equivalent Cu(1) and twelve equivalent Cu(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Cu(2) atoms. In the second Cu site, Cu(2) is bonded to four equivalent Sm(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form a mixture of corner, edge, and face-sharing CuSm4Cu8 cuboctahedra.
SmCu5 crystallizes in the hexagonal P6/mmm space group. Sm(1) is bonded in a 18-coordinate geometry to six equivalent Cu(1) and twelve equivalent Cu(2) atoms. All Sm(1)-Cu(1) bond lengths are 2.90 Å. All Sm(1)-Cu(2) bond lengths are 3.23 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Cu(2) atoms. All Cu(1)-Cu(2) bond lengths are 2.50 Å. In the second Cu site, Cu(2) is bonded to four equivalent Sm(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form a mixture of corner, edge, and face-sharing CuSm4Cu8 cuboctahedra. All Cu(2)-Cu(2) bond lengths are 2.52 Å.