TmTc2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. Tm(1) is bonded in a 12-coordinate geometry to three equivalent Tc(1) and nine equivalent Tc(2) atoms. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Tm(1) and six equivalent Tc(2) atoms to form a mixture of face, corner, and edge-sharing TcTm6Tc6 cuboctahedra. In the second Tc site, Tc(2) is bonded to six equivalent Tm(1), two equivalent Tc(1), and four equivalent Tc(2) atoms to form a mixture of face, corner, and edge-sharing TcTm6Tc6 cuboctahedra.
TmTc2 is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. Tm(1) is bonded in a 12-coordinate geometry to three equivalent Tc(1) and nine equivalent Tc(2) atoms. All Tm(1)-Tc(1) bond lengths are 3.11 Å. All Tm(1)-Tc(2) bond lengths are 3.12 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to six equivalent Tm(1) and six equivalent Tc(2) atoms to form a mixture of face, corner, and edge-sharing TcTm6Tc6 cuboctahedra. All Tc(1)-Tc(2) bond lengths are 2.70 Å. In the second Tc site, Tc(2) is bonded to six equivalent Tm(1), two equivalent Tc(1), and four equivalent Tc(2) atoms to form a mixture of face, corner, and edge-sharing TcTm6Tc6 cuboctahedra. There are two shorter (2.57 Å) and two longer (2.74 Å) Tc(2)-Tc(2) bond lengths.