ErNiGe crystallizes in the monoclinic C2/m space group. Er(1) is bonded in a 12-coordinate geometry to six equivalent Ni(1) and six equivalent Ge(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), one Ni(1), and three equivalent Ge(1) atoms. Ge(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), three equivalent Ni(1), and one Ge(1) atom.
ErNiGe crystallizes in the monoclinic C2/m space group. Er(1) is bonded in a 12-coordinate geometry to six equivalent Ni(1) and six equivalent Ge(1) atoms. There are a spread of Er(1)-Ni(1) bond distances ranging from 2.93-3.22 Å. There are a spread of Er(1)-Ge(1) bond distances ranging from 2.97-3.15 Å. Ni(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), one Ni(1), and three equivalent Ge(1) atoms. The Ni(1)-Ni(1) bond length is 2.65 Å. There are two shorter (2.40 Å) and one longer (2.63 Å) Ni(1)-Ge(1) bond length. Ge(1) is bonded in a 10-coordinate geometry to six equivalent Er(1), three equivalent Ni(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.72 Å.