HfGa3 is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Hf(1) is bonded to four equivalent Ga(1) and eight equivalent Ga(2) atoms to form HfGa12 cuboctahedra that share corners with four equivalent Hf(1)Ga12 cuboctahedra, edges with eight equivalent Hf(1)Ga12 cuboctahedra, edges with sixteen equivalent Ga(2)Hf4Ga8 cuboctahedra, faces with four equivalent Hf(1)Ga12 cuboctahedra, and faces with eight equivalent Ga(2)Hf4Ga8 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a square co-planar geometry to four equivalent Hf(1) and eight equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded to four equivalent Hf(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted GaHf4Ga8 cuboctahedra that share corners with twelve equivalent Ga(2)Hf4Ga8 cuboctahedra, edges with eight equivalent Hf(1)Ga12 cuboctahedra, edges with eight equivalent Ga(2)Hf4Ga8 cuboctahedra, faces with four equivalent Hf(1)Ga12 cuboctahedra, and faces with ten equivalent Ga(2)Hf4Ga8 cuboctahedra.
HfGa3 is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Hf(1) is bonded to four equivalent Ga(1) and eight equivalent Ga(2) atoms to form HfGa12 cuboctahedra that share corners with four equivalent Hf(1)Ga12 cuboctahedra, edges with eight equivalent Hf(1)Ga12 cuboctahedra, edges with sixteen equivalent Ga(2)Hf4Ga8 cuboctahedra, faces with four equivalent Hf(1)Ga12 cuboctahedra, and faces with eight equivalent Ga(2)Hf4Ga8 cuboctahedra. All Hf(1)-Ga(1) bond lengths are 2.73 Å. All Hf(1)-Ga(2) bond lengths are 2.96 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a square co-planar geometry to four equivalent Hf(1) and eight equivalent Ga(2) atoms. All Ga(1)-Ga(2) bond lengths are 2.96 Å. In the second Ga site, Ga(2) is bonded to four equivalent Hf(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted GaHf4Ga8 cuboctahedra that share corners with twelve equivalent Ga(2)Hf4Ga8 cuboctahedra, edges with eight equivalent Hf(1)Ga12 cuboctahedra, edges with eight equivalent Ga(2)Hf4Ga8 cuboctahedra, faces with four equivalent Hf(1)Ga12 cuboctahedra, and faces with ten equivalent Ga(2)Hf4Ga8 cuboctahedra. All Ga(2)-Ga(2) bond lengths are 2.73 Å.