Er5Ge3 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 5-coordinate geometry to five equivalent Ge(1) atoms. In the second Er site, Er(2) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Er(2) and five equivalent Er(1) atoms.
Er5Ge3 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 5-coordinate geometry to five equivalent Ge(1) atoms. There are a spread of Er(1)-Ge(1) bond distances ranging from 2.87-3.41 Å. In the second Er site, Er(2) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. All Er(2)-Ge(1) bond lengths are 3.02 Å. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Er(2) and five equivalent Er(1) atoms.