Tm2(CoGa3)3 crystallizes in the orthorhombic Cmcm space group. Tm(1) is bonded in a 11-coordinate geometry to one Ga(3), two equivalent Ga(2), two equivalent Ga(4), and six equivalent Ga(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 8-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), and four equivalent Ga(1) atoms. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to two equivalent Ga(2), two equivalent Ga(4), and four equivalent Ga(1) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Tm(1), one Co(1), two equivalent Co(2), one Ga(2), one Ga(3), one Ga(4), and two equivalent Ga(1) atoms. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to two equivalent Tm(1), one Co(1), two equivalent Co(2), one Ga(2), two equivalent Ga(1), and two equivalent Ga(4) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to two equivalent Tm(1), two equivalent Co(1), two equivalent Ga(4), and four equivalent Ga(1) atoms. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to two equivalent Tm(1), two equivalent Co(2), one Ga(3), one Ga(4), two equivalent Ga(1), and two equivalent Ga(2) atoms.
Tm2(CoGa3)3 crystallizes in the orthorhombic Cmcm space group. Tm(1) is bonded in a 11-coordinate geometry to one Ga(3), two equivalent Ga(2), two equivalent Ga(4), and six equivalent Ga(1) atoms. The Tm(1)-Ga(3) bond length is 2.98 Å. Both Tm(1)-Ga(2) bond lengths are 3.02 Å. There is one shorter (2.96 Å) and one longer (3.02 Å) Tm(1)-Ga(4) bond length. There are a spread of Tm(1)-Ga(1) bond distances ranging from 2.97-3.03 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 8-coordinate geometry to two equivalent Ga(2), two equivalent Ga(3), and four equivalent Ga(1) atoms. Both Co(1)-Ga(2) bond lengths are 2.53 Å. Both Co(1)-Ga(3) bond lengths are 2.51 Å. All Co(1)-Ga(1) bond lengths are 2.55 Å. In the second Co site, Co(2) is bonded in a 8-coordinate geometry to two equivalent Ga(2), two equivalent Ga(4), and four equivalent Ga(1) atoms. Both Co(2)-Ga(2) bond lengths are 2.56 Å. Both Co(2)-Ga(4) bond lengths are 2.52 Å. There are two shorter (2.49 Å) and two longer (2.55 Å) Co(2)-Ga(1) bond lengths. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to three equivalent Tm(1), one Co(1), two equivalent Co(2), one Ga(2), one Ga(3), one Ga(4), and two equivalent Ga(1) atoms. The Ga(1)-Ga(2) bond length is 2.75 Å. The Ga(1)-Ga(3) bond length is 2.72 Å. The Ga(1)-Ga(4) bond length is 2.73 Å. There is one shorter (2.80 Å) and one longer (2.81 Å) Ga(1)-Ga(1) bond length. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to two equivalent Tm(1), one Co(1), two equivalent Co(2), one Ga(2), two equivalent Ga(1), and two equivalent Ga(4) atoms. The Ga(2)-Ga(2) bond length is 2.67 Å. Both Ga(2)-Ga(4) bond lengths are 2.79 Å. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to two equivalent Tm(1), two equivalent Co(1), two equivalent Ga(4), and four equivalent Ga(1) atoms. Both Ga(3)-Ga(4) bond lengths are 2.74 Å. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to two equivalent Tm(1), two equivalent Co(2), one Ga(3), one Ga(4), two equivalent Ga(1), and two equivalent Ga(2) atoms. The Ga(4)-Ga(4) bond length is 2.74 Å.