ErNiGa2 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1) and ten equivalent Ga(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Ga(1) atoms. Ga(1) is bonded in a 5-coordinate geometry to five equivalent Er(1) and three equivalent Ni(1) atoms.
ErNiGa2 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1) and ten equivalent Ga(1) atoms. There is one shorter (2.80 Å) and two longer (2.97 Å) Er(1)-Ni(1) bond lengths. There are a spread of Er(1)-Ga(1) bond distances ranging from 2.94-3.23 Å. Ni(1) is bonded in a 9-coordinate geometry to three equivalent Er(1) and six equivalent Ga(1) atoms. There are two shorter (2.47 Å) and four longer (2.50 Å) Ni(1)-Ga(1) bond lengths. Ga(1) is bonded in a 5-coordinate geometry to five equivalent Er(1) and three equivalent Ni(1) atoms.