Zr3Ta is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Zr(1) is bonded to eight equivalent Zr(1) and four equivalent Ta(1) atoms to form ZrZr8Ta4 cuboctahedra that share corners with four equivalent Ta(1)Zr12 cuboctahedra, corners with fourteen equivalent Zr(1)Zr8Ta4 cuboctahedra, edges with six equivalent Ta(1)Zr12 cuboctahedra, edges with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra, faces with four equivalent Ta(1)Zr12 cuboctahedra, and faces with sixteen equivalent Zr(1)Zr8Ta4 cuboctahedra. Ta(1) is bonded to twelve equivalent Zr(1) atoms to form TaZr12 cuboctahedra that share corners with six equivalent Ta(1)Zr12 cuboctahedra, corners with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra, edges with eighteen equivalent Zr(1)Zr8Ta4 cuboctahedra, faces with eight equivalent Ta(1)Zr12 cuboctahedra, and faces with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra.
Zr3Ta is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Zr(1) is bonded to eight equivalent Zr(1) and four equivalent Ta(1) atoms to form ZrZr8Ta4 cuboctahedra that share corners with four equivalent Ta(1)Zr12 cuboctahedra, corners with fourteen equivalent Zr(1)Zr8Ta4 cuboctahedra, edges with six equivalent Ta(1)Zr12 cuboctahedra, edges with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra, faces with four equivalent Ta(1)Zr12 cuboctahedra, and faces with sixteen equivalent Zr(1)Zr8Ta4 cuboctahedra. There are a spread of Zr(1)-Zr(1) bond distances ranging from 3.07-3.24 Å. There are two shorter (3.13 Å) and two longer (3.15 Å) Zr(1)-Ta(1) bond lengths. Ta(1) is bonded to twelve equivalent Zr(1) atoms to form TaZr12 cuboctahedra that share corners with six equivalent Ta(1)Zr12 cuboctahedra, corners with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra, edges with eighteen equivalent Zr(1)Zr8Ta4 cuboctahedra, faces with eight equivalent Ta(1)Zr12 cuboctahedra, and faces with twelve equivalent Zr(1)Zr8Ta4 cuboctahedra.