Cu2SnS3 is Enargite-like structured and crystallizes in the orthorhombic Imm2 space group. Cu(1) is bonded to one S(2) and three equivalent S(1) atoms to form CuS4 tetrahedra that share corners with five equivalent Sn(1)S4 tetrahedra and corners with seven equivalent Cu(1)S4 tetrahedra. Sn(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form SnS4 tetrahedra that share corners with two equivalent Sn(1)S4 tetrahedra and corners with ten equivalent Cu(1)S4 tetrahedra. There are two inequivalent S sites. In the first S site, S(2) is bonded to two equivalent Cu(1) and two equivalent Sn(1) atoms to form SCu2Sn2 tetrahedra that share corners with two equivalent S(2)Cu2Sn2 tetrahedra and corners with ten equivalent S(1)Cu3Sn tetrahedra. In the second S site, S(1) is bonded to three equivalent Cu(1) and one Sn(1) atom to form SCu3Sn tetrahedra that share corners with five equivalent S(2)Cu2Sn2 tetrahedra and corners with seven equivalent S(1)Cu3Sn tetrahedra.
Cu2SnS3 is Enargite-like structured and crystallizes in the orthorhombic Imm2 space group. Cu(1) is bonded to one S(2) and three equivalent S(1) atoms to form CuS4 tetrahedra that share corners with five equivalent Sn(1)S4 tetrahedra and corners with seven equivalent Cu(1)S4 tetrahedra. The Cu(1)-S(2) bond length is 2.32 Å. All Cu(1)-S(1) bond lengths are 2.29 Å. Sn(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form SnS4 tetrahedra that share corners with two equivalent Sn(1)S4 tetrahedra and corners with ten equivalent Cu(1)S4 tetrahedra. Both Sn(1)-S(1) bond lengths are 2.41 Å. Both Sn(1)-S(2) bond lengths are 2.51 Å. There are two inequivalent S sites. In the first S site, S(2) is bonded to two equivalent Cu(1) and two equivalent Sn(1) atoms to form SCu2Sn2 tetrahedra that share corners with two equivalent S(2)Cu2Sn2 tetrahedra and corners with ten equivalent S(1)Cu3Sn tetrahedra. In the second S site, S(1) is bonded to three equivalent Cu(1) and one Sn(1) atom to form SCu3Sn tetrahedra that share corners with five equivalent S(2)Cu2Sn2 tetrahedra and corners with seven equivalent S(1)Cu3Sn tetrahedra.