Ag3CuIn4Te8 is Stannite-like structured and crystallizes in the tetragonal P-4 space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form AgTe4 tetrahedra that share corners with two equivalent Ag(2)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. In the second Ag site, Ag(2) is bonded to four equivalent Te(2) atoms to form AgTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent In(1)Te4 tetrahedra, and corners with four equivalent In(2)Te4 tetrahedra. Cu(1) is bonded to four equivalent Te(1) atoms to form CuTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent In(1)Te4 tetrahedra, and corners with four equivalent In(3)Te4 tetrahedra. There are three inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form InTe4 tetrahedra that share corners with two equivalent Ag(2)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, and corners with four equivalent Ag(1)Te4 tetrahedra. In the second In site, In(2) is bonded to four equivalent Te(2) atoms to form InTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent Ag(2)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. In the third In site, In(3) is bonded to four equivalent Te(1) atoms to form InTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent Cu(1)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ag(1), one Cu(1), one In(1), and one In(3) atom to form TeIn2CuAg tetrahedra that share corners with four equivalent Te(2)In2Ag2 tetrahedra and corners with eight equivalent Te(1)In2CuAg tetrahedra. In the second Te site, Te(2) is bonded to one Ag(1), one Ag(2), one In(1), and one In(2) atom to form TeIn2Ag2 tetrahedra that share corners with four equivalent Te(1)In2CuAg tetrahedra and corners with eight equivalent Te(2)In2Ag2 tetrahedra.
Ag3CuIn4Te8 is Stannite-like structured and crystallizes in the tetragonal P-4 space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form AgTe4 tetrahedra that share corners with two equivalent Ag(2)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. Both Ag(1)-Te(1) bond lengths are 2.83 Å. Both Ag(1)-Te(2) bond lengths are 2.79 Å. In the second Ag site, Ag(2) is bonded to four equivalent Te(2) atoms to form AgTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent In(1)Te4 tetrahedra, and corners with four equivalent In(2)Te4 tetrahedra. All Ag(2)-Te(2) bond lengths are 2.78 Å. Cu(1) is bonded to four equivalent Te(1) atoms to form CuTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent In(1)Te4 tetrahedra, and corners with four equivalent In(3)Te4 tetrahedra. All Cu(1)-Te(1) bond lengths are 2.65 Å. There are three inequivalent In sites. In the first In site, In(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form InTe4 tetrahedra that share corners with two equivalent Ag(2)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, and corners with four equivalent Ag(1)Te4 tetrahedra. Both In(1)-Te(1) bond lengths are 2.86 Å. Both In(1)-Te(2) bond lengths are 2.85 Å. In the second In site, In(2) is bonded to four equivalent Te(2) atoms to form InTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent Ag(2)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. All In(2)-Te(2) bond lengths are 2.84 Å. In the third In site, In(3) is bonded to four equivalent Te(1) atoms to form InTe4 tetrahedra that share corners with four equivalent Ag(1)Te4 tetrahedra, corners with four equivalent Cu(1)Te4 tetrahedra, and corners with four equivalent In(1)Te4 tetrahedra. All In(3)-Te(1) bond lengths are 2.88 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ag(1), one Cu(1), one In(1), and one In(3) atom to form TeIn2CuAg tetrahedra that share corners with four equivalent Te(2)In2Ag2 tetrahedra and corners with eight equivalent Te(1)In2CuAg tetrahedra. In the second Te site, Te(2) is bonded to one Ag(1), one Ag(2), one In(1), and one In(2) atom to form TeIn2Ag2 tetrahedra that share corners with four equivalent Te(1)In2CuAg tetrahedra and corners with eight equivalent Te(2)In2Ag2 tetrahedra.