CuGaTe2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Cu(1) is bonded to one Te(1) and three equivalent Te(2) atoms to form CuTe4 tetrahedra that share corners with six equivalent Cu(1)Te4 tetrahedra and corners with six equivalent Ga(1)Te4 tetrahedra. Ga(1) is bonded to one Te(2) and three equivalent Te(1) atoms to form GaTe4 tetrahedra that share corners with six equivalent Cu(1)Te4 tetrahedra and corners with six equivalent Ga(1)Te4 tetrahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(1) and three equivalent Ga(1) atoms to form TeGa3Cu tetrahedra that share corners with six equivalent Te(1)Ga3Cu tetrahedra and corners with six equivalent Te(2)GaCu3 tetrahedra. In the second Te site, Te(2) is bonded to three equivalent Cu(1) and one Ga(1) atom to form TeGaCu3 tetrahedra that share corners with six equivalent Te(1)Ga3Cu tetrahedra and corners with six equivalent Te(2)GaCu3 tetrahedra.
CuGaTe2 is Enargite-like structured and crystallizes in the trigonal R3m space group. Cu(1) is bonded to one Te(1) and three equivalent Te(2) atoms to form CuTe4 tetrahedra that share corners with six equivalent Cu(1)Te4 tetrahedra and corners with six equivalent Ga(1)Te4 tetrahedra. The Cu(1)-Te(1) bond length is 2.61 Å. All Cu(1)-Te(2) bond lengths are 2.58 Å. Ga(1) is bonded to one Te(2) and three equivalent Te(1) atoms to form GaTe4 tetrahedra that share corners with six equivalent Cu(1)Te4 tetrahedra and corners with six equivalent Ga(1)Te4 tetrahedra. The Ga(1)-Te(2) bond length is 2.60 Å. All Ga(1)-Te(1) bond lengths are 2.76 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(1) and three equivalent Ga(1) atoms to form TeGa3Cu tetrahedra that share corners with six equivalent Te(1)Ga3Cu tetrahedra and corners with six equivalent Te(2)GaCu3 tetrahedra. In the second Te site, Te(2) is bonded to three equivalent Cu(1) and one Ga(1) atom to form TeGaCu3 tetrahedra that share corners with six equivalent Te(1)Ga3Cu tetrahedra and corners with six equivalent Te(2)GaCu3 tetrahedra.