Pa3Hg is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Pa(1) is bonded to eight equivalent Pa(1) and four equivalent Hg(1) atoms to form distorted PaPa8Hg4 cuboctahedra that share corners with twelve equivalent Pa(1)Pa8Hg4 cuboctahedra, edges with eight equivalent Hg(1)Pa12 cuboctahedra, edges with sixteen equivalent Pa(1)Pa8Hg4 cuboctahedra, faces with four equivalent Hg(1)Pa12 cuboctahedra, and faces with fourteen equivalent Pa(1)Pa8Hg4 cuboctahedra. Hg(1) is bonded to twelve equivalent Pa(1) atoms to form HgPa12 cuboctahedra that share corners with twelve equivalent Hg(1)Pa12 cuboctahedra, edges with twenty-four equivalent Pa(1)Pa8Hg4 cuboctahedra, faces with six equivalent Hg(1)Pa12 cuboctahedra, and faces with twelve equivalent Pa(1)Pa8Hg4 cuboctahedra.
Pa3Hg is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Pa(1) is bonded to eight equivalent Pa(1) and four equivalent Hg(1) atoms to form distorted PaPa8Hg4 cuboctahedra that share corners with twelve equivalent Pa(1)Pa8Hg4 cuboctahedra, edges with eight equivalent Hg(1)Pa12 cuboctahedra, edges with sixteen equivalent Pa(1)Pa8Hg4 cuboctahedra, faces with four equivalent Hg(1)Pa12 cuboctahedra, and faces with fourteen equivalent Pa(1)Pa8Hg4 cuboctahedra. All Pa(1)-Pa(1) bond lengths are 3.27 Å. All Pa(1)-Hg(1) bond lengths are 3.27 Å. Hg(1) is bonded to twelve equivalent Pa(1) atoms to form HgPa12 cuboctahedra that share corners with twelve equivalent Hg(1)Pa12 cuboctahedra, edges with twenty-four equivalent Pa(1)Pa8Hg4 cuboctahedra, faces with six equivalent Hg(1)Pa12 cuboctahedra, and faces with twelve equivalent Pa(1)Pa8Hg4 cuboctahedra.