TmBi3 crystallizes in the hexagonal P6_3/mmc space group. Tm(1) is bonded to twelve equivalent Bi(1) atoms to form a mixture of corner and face-sharing TmBi12 cuboctahedra. Bi(1) is bonded in a 4-coordinate geometry to four equivalent Tm(1) atoms.
TmBi3 crystallizes in the hexagonal P6_3/mmc space group. Tm(1) is bonded to twelve equivalent Bi(1) atoms to form a mixture of corner and face-sharing TmBi12 cuboctahedra. There are six shorter (3.42 Å) and six longer (3.55 Å) Tm(1)-Bi(1) bond lengths. Bi(1) is bonded in a 4-coordinate geometry to four equivalent Tm(1) atoms.