Cu12As4S13 crystallizes in the triclinic P1 space group. There are twelve inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(12), one S(3), one S(5), and one S(8) atom to form corner-sharing CuS4 tetrahedra. In the second Cu site, Cu(2) is bonded to one S(1), one S(12), one S(6), and one S(7) atom to form corner-sharing CuS4 tetrahedra. In the third Cu site, Cu(3) is bonded to one S(10), one S(2), one S(5), and one S(7) atom to form corner-sharing CuS4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one S(10), one S(3), one S(4), and one S(9) atom to form corner-sharing CuS4 tetrahedra. In the fifth Cu site, Cu(5) is bonded to one S(11), one S(2), one S(6), and one S(9) atom to form corner-sharing CuS4 tetrahedra. In the sixth Cu site, Cu(6) is bonded to one S(1), one S(11), one S(4), and one S(8) atom to form corner-sharing CuS4 tetrahedra. In the seventh Cu site, Cu(7) is bonded in a distorted trigonal planar geometry to one S(1), one S(10), and one S(13) atom. In the eighth Cu site, Cu(8) is bonded in a 3-coordinate geometry to one As(4), one S(13), one S(2), and one S(8) atom. In the ninth Cu site, Cu(9) is bonded in a 3-coordinate geometry to one S(13), one S(3), and one S(6) atom. In the tenth Cu site, Cu(10) is bonded in a 3-coordinate geometry to one S(13), one S(4), and one S(7) atom. In the eleventh Cu site, Cu(11) is bonded in a distorted trigonal planar geometry to one S(11), one S(13), and one S(5) atom. In the twelfth Cu site, Cu(12) is bonded in a 3-coordinate geometry to one S(12), one S(13), and one S(9) atom. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one S(10), one S(6), and one S(8) atom. In the second As site, As(2) is bonded in a 3-coordinate geometry to one S(11), one S(3), and one S(7) atom. In the third As site, As(3) is bonded in a 3-coordinate geometry to one S(12), one S(2), and one S(4) atom. In the fourth As site, As(4) is bonded in a 4-coordinate geometry to one Cu(8), one S(1), one S(5), and one S(9) atom. There are thirteen inequivalent S sites. In the first S site, S(1) is bonded to one Cu(2), one Cu(6), one Cu(7), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the second S site, S(2) is bonded to one Cu(3), one Cu(5), one Cu(8), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the third S site, S(3) is bonded to one Cu(1), one Cu(4), one Cu(9), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth S site, S(4) is bonded to one Cu(10), one Cu(4), one Cu(6), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the fifth S site, S(5) is bonded to one Cu(1), one Cu(11), one Cu(3), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the sixth S site, S(6) is bonded to one Cu(2), one Cu(5), one Cu(9), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the seventh S site, S(7) is bonded to one Cu(10), one Cu(2), one Cu(3), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the eighth S site, S(8) is bonded to one Cu(1), one Cu(6), one Cu(8), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the ninth S site, S(9) is bonded to one Cu(12), one Cu(4), one Cu(5), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the tenth S site, S(10) is bonded to one Cu(3), one Cu(4), one Cu(7), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the eleventh S site, S(11) is bonded to one Cu(11), one Cu(5), one Cu(6), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 50°. In the twelfth S site, S(12) is bonded to one Cu(1), one Cu(12), one Cu(2), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the thirteenth S site, S(13) is bonded to one Cu(10), one Cu(11), one Cu(12), one Cu(7), one Cu(8), and one Cu(9) atom to form corner-sharing SCu6 octahedra.
Cu12As4S13 crystallizes in the triclinic P1 space group. There are twelve inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(12), one S(3), one S(5), and one S(8) atom to form corner-sharing CuS4 tetrahedra. The Cu(1)-S(12) bond length is 2.30 Å. The Cu(1)-S(3) bond length is 2.30 Å. The Cu(1)-S(5) bond length is 2.30 Å. The Cu(1)-S(8) bond length is 2.30 Å. In the second Cu site, Cu(2) is bonded to one S(1), one S(12), one S(6), and one S(7) atom to form corner-sharing CuS4 tetrahedra. The Cu(2)-S(1) bond length is 2.31 Å. The Cu(2)-S(12) bond length is 2.30 Å. The Cu(2)-S(6) bond length is 2.31 Å. The Cu(2)-S(7) bond length is 2.31 Å. In the third Cu site, Cu(3) is bonded to one S(10), one S(2), one S(5), and one S(7) atom to form corner-sharing CuS4 tetrahedra. The Cu(3)-S(10) bond length is 2.31 Å. The Cu(3)-S(2) bond length is 2.31 Å. The Cu(3)-S(5) bond length is 2.32 Å. The Cu(3)-S(7) bond length is 2.31 Å. In the fourth Cu site, Cu(4) is bonded to one S(10), one S(3), one S(4), and one S(9) atom to form corner-sharing CuS4 tetrahedra. The Cu(4)-S(10) bond length is 2.28 Å. The Cu(4)-S(3) bond length is 2.30 Å. The Cu(4)-S(4) bond length is 2.29 Å. The Cu(4)-S(9) bond length is 2.29 Å. In the fifth Cu site, Cu(5) is bonded to one S(11), one S(2), one S(6), and one S(9) atom to form corner-sharing CuS4 tetrahedra. The Cu(5)-S(11) bond length is 2.30 Å. The Cu(5)-S(2) bond length is 2.29 Å. The Cu(5)-S(6) bond length is 2.29 Å. The Cu(5)-S(9) bond length is 2.31 Å. In the sixth Cu site, Cu(6) is bonded to one S(1), one S(11), one S(4), and one S(8) atom to form corner-sharing CuS4 tetrahedra. The Cu(6)-S(1) bond length is 2.28 Å. The Cu(6)-S(11) bond length is 2.29 Å. The Cu(6)-S(4) bond length is 2.28 Å. The Cu(6)-S(8) bond length is 2.28 Å. In the seventh Cu site, Cu(7) is bonded in a distorted trigonal planar geometry to one S(1), one S(10), and one S(13) atom. The Cu(7)-S(1) bond length is 2.24 Å. The Cu(7)-S(10) bond length is 2.25 Å. The Cu(7)-S(13) bond length is 2.26 Å. In the eighth Cu site, Cu(8) is bonded in a 3-coordinate geometry to one As(4), one S(13), one S(2), and one S(8) atom. The Cu(8)-As(4) bond length is 3.09 Å. The Cu(8)-S(13) bond length is 2.26 Å. The Cu(8)-S(2) bond length is 2.25 Å. The Cu(8)-S(8) bond length is 2.23 Å. In the ninth Cu site, Cu(9) is bonded in a 3-coordinate geometry to one S(13), one S(3), and one S(6) atom. The Cu(9)-S(13) bond length is 2.27 Å. The Cu(9)-S(3) bond length is 2.24 Å. The Cu(9)-S(6) bond length is 2.26 Å. In the tenth Cu site, Cu(10) is bonded in a 3-coordinate geometry to one S(13), one S(4), and one S(7) atom. The Cu(10)-S(13) bond length is 2.27 Å. The Cu(10)-S(4) bond length is 2.24 Å. The Cu(10)-S(7) bond length is 2.27 Å. In the eleventh Cu site, Cu(11) is bonded in a distorted trigonal planar geometry to one S(11), one S(13), and one S(5) atom. The Cu(11)-S(11) bond length is 2.24 Å. The Cu(11)-S(13) bond length is 2.27 Å. The Cu(11)-S(5) bond length is 2.27 Å. In the twelfth Cu site, Cu(12) is bonded in a 3-coordinate geometry to one S(12), one S(13), and one S(9) atom. The Cu(12)-S(12) bond length is 2.25 Å. The Cu(12)-S(13) bond length is 2.27 Å. The Cu(12)-S(9) bond length is 2.25 Å. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one S(10), one S(6), and one S(8) atom. The As(1)-S(10) bond length is 2.30 Å. The As(1)-S(6) bond length is 2.30 Å. The As(1)-S(8) bond length is 2.30 Å. In the second As site, As(2) is bonded in a 3-coordinate geometry to one S(11), one S(3), and one S(7) atom. The As(2)-S(11) bond length is 2.28 Å. The As(2)-S(3) bond length is 2.30 Å. The As(2)-S(7) bond length is 2.32 Å. In the third As site, As(3) is bonded in a 3-coordinate geometry to one S(12), one S(2), and one S(4) atom. The As(3)-S(12) bond length is 2.30 Å. The As(3)-S(2) bond length is 2.31 Å. The As(3)-S(4) bond length is 2.28 Å. In the fourth As site, As(4) is bonded in a 4-coordinate geometry to one Cu(8), one S(1), one S(5), and one S(9) atom. The As(4)-S(1) bond length is 2.30 Å. The As(4)-S(5) bond length is 2.30 Å. The As(4)-S(9) bond length is 2.30 Å. There are thirteen inequivalent S sites. In the first S site, S(1) is bonded to one Cu(2), one Cu(6), one Cu(7), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the second S site, S(2) is bonded to one Cu(3), one Cu(5), one Cu(8), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the third S site, S(3) is bonded to one Cu(1), one Cu(4), one Cu(9), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth S site, S(4) is bonded to one Cu(10), one Cu(4), one Cu(6), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the fifth S site, S(5) is bonded to one Cu(1), one Cu(11), one Cu(3), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the sixth S site, S(6) is bonded to one Cu(2), one Cu(5), one Cu(9), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the seventh S site, S(7) is bonded to one Cu(10), one Cu(2), one Cu(3), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 54°. In the eighth S site, S(8) is bonded to one Cu(1), one Cu(6), one Cu(8), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the ninth S site, S(9) is bonded to one Cu(12), one Cu(4), one Cu(5), and one As(4) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(10)Cu3As tetrahedra,  a cornercorner with one S(11)Cu3As tetrahedra,  a cornercorner with one S(12)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra, and  a cornercorner with one S(6)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 53°. In the tenth S site, S(10) is bonded to one Cu(3), one Cu(4), one Cu(7), and one As(1) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the eleventh S site, S(11) is bonded to one Cu(11), one Cu(5), one Cu(6), and one As(2) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 50°. In the twelfth S site, S(12) is bonded to one Cu(1), one Cu(12), one Cu(2), and one As(3) atom to form SCu3As tetrahedra that share  a cornercorner with one S(13)Cu6 octahedra,  a cornercorner with one S(1)Cu3As tetrahedra,  a cornercorner with one S(2)Cu3As tetrahedra,  a cornercorner with one S(3)Cu3As tetrahedra,  a cornercorner with one S(4)Cu3As tetrahedra,  a cornercorner with one S(5)Cu3As tetrahedra,  a cornercorner with one S(6)Cu3As tetrahedra,  a cornercorner with one S(7)Cu3As tetrahedra,  a cornercorner with one S(8)Cu3As tetrahedra, and  a cornercorner with one S(9)Cu3As tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the thirteenth S site, S(13) is bonded to one Cu(10), one Cu(11), one Cu(12), one Cu(7), one Cu(8), and one Cu(9) atom to form corner-sharing SCu6 octahedra.