Tm3(Ni3Ga)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 Ga(1) atoms. Ni(1) is bonded in a 12-coordinate geometry to four equivalent Tm(1), six equivalent Ni(1), and two equivalent Ga(1) atoms. Ga(1) is bonded to six equivalent Tm(1) and six equivalent Ni(1) atoms to form a mixture of face and corner-sharing GaTm6Ni6 cuboctahedra.
Tm3(Ni3Ga)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 Ga(1) atoms. There are four shorter (2.73 Å) and four longer (3.01 Å) Tm(1)-Ni(1) bond lengths. All Tm(1)-Ga(1) bond lengths are 3.14 Å. Ni(1) is bonded in a 12-coordinate geometry to four equivalent Tm(1), six equivalent Ni(1), and two equivalent Ga(1) atoms. There are four shorter (2.55 Å) and two longer (2.84 Å) Ni(1)-Ni(1) bond lengths. Both Ni(1)-Ga(1) bond lengths are 2.46 Å. Ga(1) is bonded to six equivalent Tm(1) and six equivalent Ni(1) atoms to form a mixture of face and corner-sharing GaTm6Ni6 cuboctahedra.