TcIr3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Tc(1) is bonded to twelve equivalent Ir(1) atoms to form TcIr12 cuboctahedra that share corners with six equivalent Tc(1)Ir12 cuboctahedra, corners with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra, edges with eighteen equivalent Ir(1)Tc4Ir8 cuboctahedra, faces with eight equivalent Tc(1)Ir12 cuboctahedra, and faces with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra. Ir(1) is bonded to four equivalent Tc(1) and eight equivalent Ir(1) atoms to form distorted IrTc4Ir8 cuboctahedra that share corners with four equivalent Tc(1)Ir12 cuboctahedra, corners with fourteen equivalent Ir(1)Tc4Ir8 cuboctahedra, edges with six equivalent Tc(1)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra, faces with four equivalent Tc(1)Ir12 cuboctahedra, and faces with sixteen equivalent Ir(1)Tc4Ir8 cuboctahedra.
TcIr3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Tc(1) is bonded to twelve equivalent Ir(1) atoms to form TcIr12 cuboctahedra that share corners with six equivalent Tc(1)Ir12 cuboctahedra, corners with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra, edges with eighteen equivalent Ir(1)Tc4Ir8 cuboctahedra, faces with eight equivalent Tc(1)Ir12 cuboctahedra, and faces with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra. There are six shorter (2.70 Å) and six longer (2.74 Å) Tc(1)-Ir(1) bond lengths. Ir(1) is bonded to four equivalent Tc(1) and eight equivalent Ir(1) atoms to form distorted IrTc4Ir8 cuboctahedra that share corners with four equivalent Tc(1)Ir12 cuboctahedra, corners with fourteen equivalent Ir(1)Tc4Ir8 cuboctahedra, edges with six equivalent Tc(1)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Tc4Ir8 cuboctahedra, faces with four equivalent Tc(1)Ir12 cuboctahedra, and faces with sixteen equivalent Ir(1)Tc4Ir8 cuboctahedra. There are four shorter (2.70 Å) and four longer (2.74 Å) Ir(1)-Ir(1) bond lengths.