Tc3In is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to four equivalent Tc(1), four equivalent Tc(2), and four equivalent In(1) atoms to form TcIn4Tc8 cuboctahedra that share corners with twelve equivalent Tc(1)In4Tc8 cuboctahedra, edges with eight equivalent Tc(1)In4Tc8 cuboctahedra, edges with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with eight equivalent In(1)Tc12 cuboctahedra, faces with four equivalent Tc(2)In4Tc8 cuboctahedra, faces with four equivalent In(1)Tc12 cuboctahedra, and faces with ten equivalent Tc(1)In4Tc8 cuboctahedra. In the second Tc site, Tc(2) is bonded to eight equivalent Tc(1) and four equivalent In(1) atoms to form distorted TcIn4Tc8 cuboctahedra that share corners with four equivalent Tc(2)In4Tc8 cuboctahedra, corners with eight equivalent In(1)Tc12 cuboctahedra, edges with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with sixteen equivalent Tc(1)In4Tc8 cuboctahedra, faces with four equivalent Tc(2)In4Tc8 cuboctahedra, faces with six equivalent In(1)Tc12 cuboctahedra, and faces with eight equivalent Tc(1)In4Tc8 cuboctahedra. In(1) is bonded to four equivalent Tc(2) and eight equivalent Tc(1) atoms to form InTc12 cuboctahedra that share corners with four equivalent In(1)Tc12 cuboctahedra, corners with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with eight equivalent In(1)Tc12 cuboctahedra, edges with sixteen equivalent Tc(1)In4Tc8 cuboctahedra, faces with four equivalent In(1)Tc12 cuboctahedra, faces with six equivalent Tc(2)In4Tc8 cuboctahedra, and faces with eight equivalent Tc(1)In4Tc8 cuboctahedra.
Tc3In is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded to four equivalent Tc(1), four equivalent Tc(2), and four equivalent In(1) atoms to form TcIn4Tc8 cuboctahedra that share corners with twelve equivalent Tc(1)In4Tc8 cuboctahedra, edges with eight equivalent Tc(1)In4Tc8 cuboctahedra, edges with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with eight equivalent In(1)Tc12 cuboctahedra, faces with four equivalent Tc(2)In4Tc8 cuboctahedra, faces with four equivalent In(1)Tc12 cuboctahedra, and faces with ten equivalent Tc(1)In4Tc8 cuboctahedra. All Tc(1)-Tc(1) bond lengths are 2.74 Å. All Tc(1)-Tc(2) bond lengths are 2.87 Å. All Tc(1)-In(1) bond lengths are 2.87 Å. In the second Tc site, Tc(2) is bonded to eight equivalent Tc(1) and four equivalent In(1) atoms to form distorted TcIn4Tc8 cuboctahedra that share corners with four equivalent Tc(2)In4Tc8 cuboctahedra, corners with eight equivalent In(1)Tc12 cuboctahedra, edges with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with sixteen equivalent Tc(1)In4Tc8 cuboctahedra, faces with four equivalent Tc(2)In4Tc8 cuboctahedra, faces with six equivalent In(1)Tc12 cuboctahedra, and faces with eight equivalent Tc(1)In4Tc8 cuboctahedra. All Tc(2)-In(1) bond lengths are 2.74 Å. In(1) is bonded to four equivalent Tc(2) and eight equivalent Tc(1) atoms to form InTc12 cuboctahedra that share corners with four equivalent In(1)Tc12 cuboctahedra, corners with eight equivalent Tc(2)In4Tc8 cuboctahedra, edges with eight equivalent In(1)Tc12 cuboctahedra, edges with sixteen equivalent Tc(1)In4Tc8 cuboctahedra, faces with four equivalent In(1)Tc12 cuboctahedra, faces with six equivalent Tc(2)In4Tc8 cuboctahedra, and faces with eight equivalent Tc(1)In4Tc8 cuboctahedra.