Er5NiPb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1) and five equivalent Pb(1) atoms. In the second Er site, Er(2) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. Ni(1) is bonded to six equivalent Er(1) atoms to form face-sharing NiEr6 octahedra. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Er(2) and five equivalent Er(1) atoms.
Er5NiPb3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 7-coordinate geometry to two equivalent Ni(1) and five equivalent Pb(1) atoms. Both Er(1)-Ni(1) bond lengths are 2.70 Å. There are a spread of Er(1)-Pb(1) bond distances ranging from 3.14-3.63 Å. In the second Er site, Er(2) is bonded in a 6-coordinate geometry to six equivalent Pb(1) atoms. All Er(2)-Pb(1) bond lengths are 3.21 Å. Ni(1) is bonded to six equivalent Er(1) atoms to form face-sharing NiEr6 octahedra. Pb(1) is bonded in a 9-coordinate geometry to four equivalent Er(2) and five equivalent Er(1) atoms.