InGaSb2 is Chalcopyrite-like structured and crystallizes in the trigonal R3m space group. In(1) is bonded to one Sb(2) and three equivalent Sb(1) atoms to form InSb4 tetrahedra that share corners with six equivalent In(1)Sb4 tetrahedra and corners with six equivalent Ga(1)Sb4 tetrahedra. Ga(1) is bonded to one Sb(1) and three equivalent Sb(2) atoms to form GaSb4 tetrahedra that share corners with six equivalent In(1)Sb4 tetrahedra and corners with six equivalent Ga(1)Sb4 tetrahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to three equivalent In(1) and one Ga(1) atom to form SbIn3Ga tetrahedra that share corners with six equivalent Sb(1)In3Ga tetrahedra and corners with six equivalent Sb(2)InGa3 tetrahedra. In the second Sb site, Sb(2) is bonded to one In(1) and three equivalent Ga(1) atoms to form SbInGa3 tetrahedra that share corners with six equivalent Sb(1)In3Ga tetrahedra and corners with six equivalent Sb(2)InGa3 tetrahedra.
InGaSb2 is Chalcopyrite-like structured and crystallizes in the trigonal R3m space group. In(1) is bonded to one Sb(2) and three equivalent Sb(1) atoms to form InSb4 tetrahedra that share corners with six equivalent In(1)Sb4 tetrahedra and corners with six equivalent Ga(1)Sb4 tetrahedra. The In(1)-Sb(2) bond length is 2.87 Å. All In(1)-Sb(1) bond lengths are 2.83 Å. Ga(1) is bonded to one Sb(1) and three equivalent Sb(2) atoms to form GaSb4 tetrahedra that share corners with six equivalent In(1)Sb4 tetrahedra and corners with six equivalent Ga(1)Sb4 tetrahedra. The Ga(1)-Sb(1) bond length is 2.69 Å. All Ga(1)-Sb(2) bond lengths are 2.76 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to three equivalent In(1) and one Ga(1) atom to form SbIn3Ga tetrahedra that share corners with six equivalent Sb(1)In3Ga tetrahedra and corners with six equivalent Sb(2)InGa3 tetrahedra. In the second Sb site, Sb(2) is bonded to one In(1) and three equivalent Ga(1) atoms to form SbInGa3 tetrahedra that share corners with six equivalent Sb(1)In3Ga tetrahedra and corners with six equivalent Sb(2)InGa3 tetrahedra.