Hg3Cd is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. Hg(1) is bonded to eight equivalent Hg(1) and four equivalent Cd(1) atoms to form distorted HgCd4Hg8 cuboctahedra that share corners with four equivalent Cd(1)Hg12 cuboctahedra, corners with fourteen equivalent Hg(1)Cd4Hg8 cuboctahedra, edges with six equivalent Cd(1)Hg12 cuboctahedra, edges with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra, faces with four equivalent Cd(1)Hg12 cuboctahedra, and faces with sixteen equivalent Hg(1)Cd4Hg8 cuboctahedra. Cd(1) is bonded to twelve equivalent Hg(1) atoms to form CdHg12 cuboctahedra that share corners with six equivalent Cd(1)Hg12 cuboctahedra, corners with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra, edges with eighteen equivalent Hg(1)Cd4Hg8 cuboctahedra, faces with eight equivalent Cd(1)Hg12 cuboctahedra, and faces with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra.
Hg3Cd is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. Hg(1) is bonded to eight equivalent Hg(1) and four equivalent Cd(1) atoms to form distorted HgCd4Hg8 cuboctahedra that share corners with four equivalent Cd(1)Hg12 cuboctahedra, corners with fourteen equivalent Hg(1)Cd4Hg8 cuboctahedra, edges with six equivalent Cd(1)Hg12 cuboctahedra, edges with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra, faces with four equivalent Cd(1)Hg12 cuboctahedra, and faces with sixteen equivalent Hg(1)Cd4Hg8 cuboctahedra. There are a spread of Hg(1)-Hg(1) bond distances ranging from 3.26-3.31 Å. There are two shorter (3.26 Å) and two longer (3.29 Å) Hg(1)-Cd(1) bond lengths. Cd(1) is bonded to twelve equivalent Hg(1) atoms to form CdHg12 cuboctahedra that share corners with six equivalent Cd(1)Hg12 cuboctahedra, corners with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra, edges with eighteen equivalent Hg(1)Cd4Hg8 cuboctahedra, faces with eight equivalent Cd(1)Hg12 cuboctahedra, and faces with twelve equivalent Hg(1)Cd4Hg8 cuboctahedra.