Er2NiAl4Ge2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent Al(1) and five equivalent Ge(1) atoms. Ni(1) is bonded in a body-centered cubic geometry to eight equivalent Al(1) atoms. Al(1) is bonded in a 4-coordinate geometry to two equivalent Er(1), two equivalent Ni(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to five equivalent Er(1) and four equivalent Al(1) atoms.
Er2NiAl4Ge2 crystallizes in the tetragonal I4/mmm space group. Er(1) is bonded in a 9-coordinate geometry to four equivalent Al(1) and five equivalent Ge(1) atoms. All Er(1)-Al(1) bond lengths are 3.08 Å. There is one shorter (2.89 Å) and four longer (2.95 Å) Er(1)-Ge(1) bond lengths. Ni(1) is bonded in a body-centered cubic geometry to eight equivalent Al(1) atoms. All Ni(1)-Al(1) bond lengths are 2.44 Å. Al(1) is bonded in a 4-coordinate geometry to two equivalent Er(1), two equivalent Ni(1), and two equivalent Ge(1) atoms. Both Al(1)-Ge(1) bond lengths are 2.76 Å. Ge(1) is bonded in a 9-coordinate geometry to five equivalent Er(1) and four equivalent Al(1) atoms.