Ag3Cu is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Ag(1) is bonded to eight equivalent Ag(1) and four equivalent Cu(1) atoms to form AgCu4Ag8 cuboctahedra that share corners with four equivalent Cu(1)Ag12 cuboctahedra, corners with fourteen equivalent Ag(1)Cu4Ag8 cuboctahedra, edges with six equivalent Cu(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra, faces with four equivalent Cu(1)Ag12 cuboctahedra, and faces with sixteen equivalent Ag(1)Cu4Ag8 cuboctahedra. Cu(1) is bonded to twelve equivalent Ag(1) atoms to form CuAg12 cuboctahedra that share corners with six equivalent Cu(1)Ag12 cuboctahedra, corners with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra, edges with eighteen equivalent Ag(1)Cu4Ag8 cuboctahedra, faces with eight equivalent Cu(1)Ag12 cuboctahedra, and faces with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra.
Ag3Cu is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Ag(1) is bonded to eight equivalent Ag(1) and four equivalent Cu(1) atoms to form AgCu4Ag8 cuboctahedra that share corners with four equivalent Cu(1)Ag12 cuboctahedra, corners with fourteen equivalent Ag(1)Cu4Ag8 cuboctahedra, edges with six equivalent Cu(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra, faces with four equivalent Cu(1)Ag12 cuboctahedra, and faces with sixteen equivalent Ag(1)Cu4Ag8 cuboctahedra. There are a spread of Ag(1)-Ag(1) bond distances ranging from 2.83-2.92 Å. There are two shorter (2.84 Å) and two longer (2.87 Å) Ag(1)-Cu(1) bond lengths. Cu(1) is bonded to twelve equivalent Ag(1) atoms to form CuAg12 cuboctahedra that share corners with six equivalent Cu(1)Ag12 cuboctahedra, corners with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra, edges with eighteen equivalent Ag(1)Cu4Ag8 cuboctahedra, faces with eight equivalent Cu(1)Ag12 cuboctahedra, and faces with twelve equivalent Ag(1)Cu4Ag8 cuboctahedra.