TbNiAl2 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1) and ten equivalent Al(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Al(1) atoms. Al(1) is bonded in a 11-coordinate geometry to five equivalent Tb(1), three equivalent Ni(1), and three equivalent Al(1) atoms.
TbNiAl2 crystallizes in the orthorhombic Cmcm space group. Tb(1) is bonded in a 13-coordinate geometry to three equivalent Ni(1) and ten equivalent Al(1) atoms. There is one shorter (2.84 Å) and two longer (3.08 Å) Tb(1)-Ni(1) bond lengths. There are a spread of Tb(1)-Al(1) bond distances ranging from 3.09-3.32 Å. Ni(1) is bonded in a 9-coordinate geometry to three equivalent Tb(1) and six equivalent Al(1) atoms. There are two shorter (2.44 Å) and four longer (2.48 Å) Ni(1)-Al(1) bond lengths. Al(1) is bonded in a 11-coordinate geometry to five equivalent Tb(1), three equivalent Ni(1), and three equivalent Al(1) atoms. There is one shorter (2.67 Å) and two longer (2.81 Å) Al(1)-Al(1) bond lengths.