CuGaSSe is Stannite-like structured and crystallizes in the orthorhombic I2_12_12_1 space group. Cu(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form CuSe2S2 tetrahedra that share corners with four equivalent Cu(1)Se2S2 tetrahedra and corners with eight equivalent Ga(1)Se2S2 tetrahedra. Ga(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Ga(1)Se2S2 tetrahedra and corners with eight equivalent Cu(1)Se2S2 tetrahedra. Se(1) is bonded to two equivalent Cu(1) and two equivalent Ga(1) atoms to form SeGa2Cu2 tetrahedra that share corners with four equivalent Se(1)Ga2Cu2 tetrahedra and corners with eight equivalent S(1)Ga2Cu2 tetrahedra. S(1) is bonded to two equivalent Cu(1) and two equivalent Ga(1) atoms to form SGa2Cu2 tetrahedra that share corners with four equivalent S(1)Ga2Cu2 tetrahedra and corners with eight equivalent Se(1)Ga2Cu2 tetrahedra.
CuGaSSe is Stannite-like structured and crystallizes in the orthorhombic I2_12_12_1 space group. Cu(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form CuSe2S2 tetrahedra that share corners with four equivalent Cu(1)Se2S2 tetrahedra and corners with eight equivalent Ga(1)Se2S2 tetrahedra. Both Cu(1)-Se(1) bond lengths are 2.41 Å. Both Cu(1)-S(1) bond lengths are 2.30 Å. Ga(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Ga(1)Se2S2 tetrahedra and corners with eight equivalent Cu(1)Se2S2 tetrahedra. Both Ga(1)-Se(1) bond lengths are 2.42 Å. Both Ga(1)-S(1) bond lengths are 2.33 Å. Se(1) is bonded to two equivalent Cu(1) and two equivalent Ga(1) atoms to form SeGa2Cu2 tetrahedra that share corners with four equivalent Se(1)Ga2Cu2 tetrahedra and corners with eight equivalent S(1)Ga2Cu2 tetrahedra. S(1) is bonded to two equivalent Cu(1) and two equivalent Ga(1) atoms to form SGa2Cu2 tetrahedra that share corners with four equivalent S(1)Ga2Cu2 tetrahedra and corners with eight equivalent Se(1)Ga2Cu2 tetrahedra.