Tb3Ni6Al2 crystallizes in the cubic Im-3m space group. Tb(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 Tb(1), four equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to six equivalent Tb(1) and six equivalent Ni(1) atoms to form a mixture of distorted face and corner-sharing AlTb6Ni6 cuboctahedra.
Tb3Ni6Al2 crystallizes in the cubic Im-3m space group. Tb(1) is bonded in a 12-coordinate geometry to eight equivalent Ni(1) and four equivalent Al(1) atoms. There are four shorter (2.77 Å) and four longer (2.99 Å) Tb(1)-Ni(1) bond lengths. All Tb(1)-Al(1) bond lengths are 3.16 Å. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Tb(1), four equivalent Ni(1), and two equivalent Al(1) atoms. All Ni(1)-Ni(1) bond lengths are 2.56 Å. Both Ni(1)-Al(1) bond lengths are 2.46 Å. Al(1) is bonded to six equivalent Tb(1) and six equivalent Ni(1) atoms to form a mixture of distorted face and corner-sharing AlTb6Ni6 cuboctahedra.