HfAgGa2 crystallizes in the tetragonal P4/mmm space group. Hf(1) is bonded to four equivalent Ag(1) and eight equivalent Ga(1) atoms to form HfGa8Ag4 cuboctahedra that share corners with twelve equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with sixteen equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Ag(1)Hf4Ga8 cuboctahedra, faces with six equivalent Hf(1)Ga8Ag4 cuboctahedra, and faces with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra. Ag(1) is bonded to four equivalent Hf(1) and eight equivalent Ga(1) atoms to form AgHf4Ga8 cuboctahedra that share corners with twelve equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with eight equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with sixteen equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Hf(1)Ga8Ag4 cuboctahedra, faces with six equivalent Ag(1)Hf4Ga8 cuboctahedra, and faces with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra. Ga(1) is bonded to four equivalent Hf(1), four equivalent Ag(1), and four equivalent Ga(1) atoms to form distorted GaHf4Ga4Ag4 cuboctahedra that share corners with twelve equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, edges with eight equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Hf(1)Ga8Ag4 cuboctahedra, faces with four equivalent Ag(1)Hf4Ga8 cuboctahedra, and faces with ten equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra.
HfAgGa2 crystallizes in the tetragonal P4/mmm space group. Hf(1) is bonded to four equivalent Ag(1) and eight equivalent Ga(1) atoms to form HfGa8Ag4 cuboctahedra that share corners with twelve equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with sixteen equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Ag(1)Hf4Ga8 cuboctahedra, faces with six equivalent Hf(1)Ga8Ag4 cuboctahedra, and faces with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra. All Hf(1)-Ag(1) bond lengths are 2.97 Å. All Hf(1)-Ga(1) bond lengths are 2.90 Å. Ag(1) is bonded to four equivalent Hf(1) and eight equivalent Ga(1) atoms to form AgHf4Ga8 cuboctahedra that share corners with twelve equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with eight equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with sixteen equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Hf(1)Ga8Ag4 cuboctahedra, faces with six equivalent Ag(1)Hf4Ga8 cuboctahedra, and faces with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra. All Ag(1)-Ga(1) bond lengths are 2.90 Å. Ga(1) is bonded to four equivalent Hf(1), four equivalent Ag(1), and four equivalent Ga(1) atoms to form distorted GaHf4Ga4Ag4 cuboctahedra that share corners with twelve equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, edges with eight equivalent Hf(1)Ga8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Hf4Ga8 cuboctahedra, edges with eight equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra, faces with four equivalent Hf(1)Ga8Ag4 cuboctahedra, faces with four equivalent Ag(1)Hf4Ga8 cuboctahedra, and faces with ten equivalent Ga(1)Hf4Ga4Ag4 cuboctahedra. All Ga(1)-Ga(1) bond lengths are 2.97 Å.