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ErPb3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Er is bonded to twelve equivalent Pb atoms to form a mixture of face and corner-sharing ErPb12 cuboctahedra. All Er–Pb bond lengths are 3.45 Å. Pb is bonded in a distorted square co-planar geometry to four equivalent Er atoms.
Er3Pb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded to eight Er and four equivalent Pb atoms to form distorted ErEr8Pb4 cuboctahedra that share corners with twelve equivalent ErEr8Pb4 cuboctahedra, edges with eight equivalent ErEr8Pb4 cuboctahedra, edges with eight equivalent PbEr12 cuboctahedra, faces with four equivalent PbEr12 cuboctahedra, and faces with ten equivalent ErEr8Pb4 cuboctahedra. There are four shorter (3.29 Å) and four longer (3.52 Å) Er–Er bond lengths. All Er–Pb bond lengths are 3.52 Å. In the second Er site, Er is bonded in a square co-planar geometry to eight equivalent Er and four equivalent Pb atoms. All Er–Pb bond lengths are 3.29 Å. Pb is bonded to twelve Er atoms to form PbEr12 cuboctahedra that share corners with four equivalent PbEr12 cuboctahedra, edges with eight equivalent PbEr12 cuboctahedra, edges with sixteen equivalent ErEr8Pb4 cuboctahedra, faces with four equivalent PbEr12 cuboctahedra, and faces with eight equivalent ErEr8Pb4 cuboctahedra.
Er3Pb is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Er is bonded in a distorted see-saw-like geometry to four equivalent Pb atoms. All Er–Pb bond lengths are 3.42 Å. Pb is bonded to twelve equivalent Er atoms to form a mixture of face and corner-sharing PbEr12 cuboctahedra.