ErRhGe crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 11-coordinate geometry to six equivalent Rh(1) and five equivalent Ge(1) atoms. Rh(1) is bonded in a 10-coordinate geometry to six equivalent Er(1) and four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to five equivalent Er(1) and four equivalent Rh(1) atoms.
ErRhGe crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 11-coordinate geometry to six equivalent Rh(1) and five equivalent Ge(1) atoms. There are a spread of Er(1)-Rh(1) bond distances ranging from 2.96-3.32 Å. There are two shorter (2.97 Å) and three longer (2.99 Å) Er(1)-Ge(1) bond lengths. Rh(1) is bonded in a 10-coordinate geometry to six equivalent Er(1) and four equivalent Ge(1) atoms. There are three shorter (2.53 Å) and one longer (2.61 Å) Rh(1)-Ge(1) bond length. Ge(1) is bonded in a 9-coordinate geometry to five equivalent Er(1) and four equivalent Rh(1) atoms.