ErAuCu4 is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Au(1) and twelve equivalent Cu(1) atoms. Au(1) is bonded in a 16-coordinate geometry to four equivalent Er(1) and twelve equivalent Cu(1) atoms. Cu(1) is bonded to three equivalent Er(1), three equivalent Au(1), and six equivalent Cu(1) atoms to form a mixture of face, corner, and edge-sharing CuEr3Cu6Au3 cuboctahedra.
ErAuCu4 is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Au(1) and twelve equivalent Cu(1) atoms. All Er(1)-Au(1) bond lengths are 3.04 Å. All Er(1)-Cu(1) bond lengths are 2.91 Å. Au(1) is bonded in a 16-coordinate geometry to four equivalent Er(1) and twelve equivalent Cu(1) atoms. All Au(1)-Cu(1) bond lengths are 2.91 Å. Cu(1) is bonded to three equivalent Er(1), three equivalent Au(1), and six equivalent Cu(1) atoms to form a mixture of face, corner, and edge-sharing CuEr3Cu6Au3 cuboctahedra. There are three shorter (2.47 Å) and three longer (2.50 Å) Cu(1)-Cu(1) bond lengths.