Er3(Ni3Al)2 crystallizes in the cubic Im-3m space group. Er(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Al(1) atoms. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Er(1), four equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded in a distorted hexagonal planar geometry to six equivalent Er(1) and six equivalent Ni(1) atoms.
Er3(Ni3Al)2 crystallizes in the cubic Im-3m space group. Er(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Al(1) atoms. There are four shorter (2.75 Å) and four longer (2.96 Å) Er(1)-Ni(1) bond lengths. All Er(1)-Al(1) bond lengths are 3.13 Å. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Er(1), four equivalent Ni(1), and two equivalent Al(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.54 Å. Both Ni(1)-Al(1) bond lengths are 2.43 Å. Al(1) is bonded in a distorted hexagonal planar geometry to six equivalent Er(1) and six equivalent Ni(1) atoms.