Rh3Ga is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Ga(1) atoms to form distorted RhGa4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Ga4Rh8 cuboctahedra. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Ga(1) atoms to form RhGa4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Ga4Rh8 cuboctahedra, corners with eight equivalent Ga(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with six equivalent Ga(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. Ga(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form GaRh12 cuboctahedra that share corners with four equivalent Ga(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Ga4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra.
Rh3Ga is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Ga(1) atoms to form distorted RhGa4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Ga4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Ga4Rh8 cuboctahedra. All Rh(1)-Rh(1) bond lengths are 2.72 Å. All Rh(1)-Rh(2) bond lengths are 2.68 Å. All Rh(1)-Ga(1) bond lengths are 2.68 Å. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Ga(1) atoms to form RhGa4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Ga4Rh8 cuboctahedra, corners with eight equivalent Ga(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Rh(2)Ga4Rh8 cuboctahedra, faces with six equivalent Ga(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra. All Rh(2)-Ga(1) bond lengths are 2.72 Å. Ga(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form GaRh12 cuboctahedra that share corners with four equivalent Ga(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Ga4Rh8 cuboctahedra, edges with eight equivalent Ga(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Ga4Rh8 cuboctahedra, faces with four equivalent Ga(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Ga4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Ga4Rh8 cuboctahedra.