Er3Pb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to four equivalent Er(1), four equivalent Er(2), and four equivalent Pb(1) atoms to form distorted ErEr8Pb4 cuboctahedra that share corners with twelve equivalent Er(1)Er8Pb4 cuboctahedra, edges with eight equivalent Er(1)Er8Pb4 cuboctahedra, edges with eight equivalent Pb(1)Er12 cuboctahedra, faces with four equivalent Pb(1)Er12 cuboctahedra, and faces with ten equivalent Er(1)Er8Pb4 cuboctahedra. In the second Er site, Er(2) is bonded in a square co-planar geometry to eight equivalent Er(1) and four equivalent Pb(1) atoms. Pb(1) is bonded to four equivalent Er(2) and eight equivalent Er(1) atoms to form PbEr12 cuboctahedra that share corners with four equivalent Pb(1)Er12 cuboctahedra, edges with eight equivalent Pb(1)Er12 cuboctahedra, edges with sixteen equivalent Er(1)Er8Pb4 cuboctahedra, faces with four equivalent Pb(1)Er12 cuboctahedra, and faces with eight equivalent Er(1)Er8Pb4 cuboctahedra.
Er3Pb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to four equivalent Er(1), four equivalent Er(2), and four equivalent Pb(1) atoms to form distorted ErEr8Pb4 cuboctahedra that share corners with twelve equivalent Er(1)Er8Pb4 cuboctahedra, edges with eight equivalent Er(1)Er8Pb4 cuboctahedra, edges with eight equivalent Pb(1)Er12 cuboctahedra, faces with four equivalent Pb(1)Er12 cuboctahedra, and faces with ten equivalent Er(1)Er8Pb4 cuboctahedra. All Er(1)-Er(1) bond lengths are 3.26 Å. All Er(1)-Er(2) bond lengths are 3.50 Å. All Er(1)-Pb(1) bond lengths are 3.50 Å. In the second Er site, Er(2) is bonded in a square co-planar geometry to eight equivalent Er(1) and four equivalent Pb(1) atoms. All Er(2)-Pb(1) bond lengths are 3.26 Å. Pb(1) is bonded to four equivalent Er(2) and eight equivalent Er(1) atoms to form PbEr12 cuboctahedra that share corners with four equivalent Pb(1)Er12 cuboctahedra, edges with eight equivalent Pb(1)Er12 cuboctahedra, edges with sixteen equivalent Er(1)Er8Pb4 cuboctahedra, faces with four equivalent Pb(1)Er12 cuboctahedra, and faces with eight equivalent Er(1)Er8Pb4 cuboctahedra.