Tb2Co2I crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 9-coordinate geometry to six equivalent Co(1) and three equivalent I(1) atoms. Co(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Co(1) atoms. I(1) is bonded in a 6-coordinate geometry to six equivalent Tb(1) atoms.
Tb2Co2I crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 9-coordinate geometry to six equivalent Co(1) and three equivalent I(1) atoms. There are three shorter (2.87 Å) and three longer (2.95 Å) Tb(1)-Co(1) bond lengths. All Tb(1)-I(1) bond lengths are 3.38 Å. Co(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Co(1) atoms. All Co(1)-Co(1) bond lengths are 2.31 Å. I(1) is bonded in a 6-coordinate geometry to six equivalent Tb(1) atoms.