Tm3(Ni3Al)2 crystallizes in the cubic Im-3m space group. Tm(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 Tm(1), four equivalent Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded in a distorted hexagonal planar geometry to six equivalent Tm(1) and six equivalent Ni(1) atoms.
Tm3(Ni3Al)2 crystallizes in the cubic Im-3m space group. Tm(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 (2.98 Å) Tm(1)-Ni(1) bond lengths. All Tm(1)-Al(1) bond lengths are 3.16 Å. Ni(1) is bonded in a 10-coordinate geometry to four equivalent Tm(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 2.45 Å. Al(1) is bonded in a distorted hexagonal planar geometry to six equivalent Tm(1) and six equivalent Ni(1) atoms.