Sm3Cu3Sb4 crystallizes in the cubic I-43d space group. Sm(1) is bonded in a 12-coordinate geometry to four equivalent Cu(1) and eight equivalent Sb(1) atoms. Cu(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sb(1) atoms. Sb(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1) and three equivalent Cu(1) atoms.
Sm3Cu3Sb4 crystallizes in the cubic I-43d space group. Sm(1) is bonded in a 12-coordinate geometry to four equivalent Cu(1) and eight equivalent Sb(1) atoms. All Sm(1)-Cu(1) bond lengths are 2.96 Å. There are four shorter (3.30 Å) and four longer (3.39 Å) Sm(1)-Sb(1) bond lengths. Cu(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sb(1) atoms. All Cu(1)-Sb(1) bond lengths are 2.68 Å. Sb(1) is bonded in a 9-coordinate geometry to six equivalent Sm(1) and three equivalent Cu(1) atoms.