TaRu3 is beta-derived structured and crystallizes in the hexagonal P-6m2 space group. Ta(1) is bonded to six equivalent Ta(1) and six equivalent Ru(2) atoms to form distorted TaTa6Ru6 cuboctahedra that share corners with six equivalent Ta(1)Ta6Ru6 cuboctahedra, corners with twelve equivalent Ru(1)Ru12 cuboctahedra, edges with six equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with two equivalent Ru(1)Ru12 cuboctahedra, faces with six equivalent Ta(1)Ta6Ru6 cuboctahedra, and faces with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to six equivalent Ru(1) and six equivalent Ru(2) atoms to form RuRu12 cuboctahedra that share corners with six equivalent Ru(1)Ru12 cuboctahedra, corners with twelve equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with six equivalent Ru(1)Ru12 cuboctahedra, edges with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with two equivalent Ta(1)Ta6Ru6 cuboctahedra, faces with six equivalent Ru(1)Ru12 cuboctahedra, and faces with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra. In the second Ru site, Ru(2) is bonded to three equivalent Ta(1), three equivalent Ru(1), and six equivalent Ru(2) atoms to form distorted RuTa3Ru9 cuboctahedra that share corners with eighteen equivalent Ru(2)Ta3Ru9 cuboctahedra, edges with six equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with six equivalent Ru(1)Ru12 cuboctahedra, edges with six equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with six equivalent Ta(1)Ta6Ru6 cuboctahedra, faces with six equivalent Ru(1)Ru12 cuboctahedra, and faces with eight equivalent Ru(2)Ta3Ru9 cuboctahedra.
TaRu3 is beta-derived structured and crystallizes in the hexagonal P-6m2 space group. Ta(1) is bonded to six equivalent Ta(1) and six equivalent Ru(2) atoms to form distorted TaTa6Ru6 cuboctahedra that share corners with six equivalent Ta(1)Ta6Ru6 cuboctahedra, corners with twelve equivalent Ru(1)Ru12 cuboctahedra, edges with six equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with two equivalent Ru(1)Ru12 cuboctahedra, faces with six equivalent Ta(1)Ta6Ru6 cuboctahedra, and faces with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra. All Ta(1)-Ta(1) bond lengths are 2.78 Å. All Ta(1)-Ru(2) bond lengths are 2.88 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to six equivalent Ru(1) and six equivalent Ru(2) atoms to form RuRu12 cuboctahedra that share corners with six equivalent Ru(1)Ru12 cuboctahedra, corners with twelve equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with six equivalent Ru(1)Ru12 cuboctahedra, edges with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with two equivalent Ta(1)Ta6Ru6 cuboctahedra, faces with six equivalent Ru(1)Ru12 cuboctahedra, and faces with twelve equivalent Ru(2)Ta3Ru9 cuboctahedra. All Ru(1)-Ru(1) bond lengths are 2.78 Å. All Ru(1)-Ru(2) bond lengths are 2.65 Å. In the second Ru site, Ru(2) is bonded to three equivalent Ta(1), three equivalent Ru(1), and six equivalent Ru(2) atoms to form distorted RuTa3Ru9 cuboctahedra that share corners with eighteen equivalent Ru(2)Ta3Ru9 cuboctahedra, edges with six equivalent Ta(1)Ta6Ru6 cuboctahedra, edges with six equivalent Ru(1)Ru12 cuboctahedra, edges with six equivalent Ru(2)Ta3Ru9 cuboctahedra, faces with six equivalent Ta(1)Ta6Ru6 cuboctahedra, faces with six equivalent Ru(1)Ru12 cuboctahedra, and faces with eight equivalent Ru(2)Ta3Ru9 cuboctahedra. All Ru(2)-Ru(2) bond lengths are 2.78 Å.