Ge1Cu2Te3 is Enargite-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(10), one Te(3), one Te(4), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(11), one Te(5), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the third Cu site, Cu(3) is bonded to one Te(12), one Te(2), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one Te(1), one Te(12), one Te(6), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fifth Cu site, Cu(5) is bonded to one Te(10), one Te(2), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the sixth Cu site, Cu(6) is bonded to one Te(11), one Te(3), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the seventh Cu site, Cu(7) is bonded to one Te(12), one Te(3), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the eighth Cu site, Cu(8) is bonded to one Te(1), one Te(10), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(11), one Te(2), one Te(6), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the second Ge site, Ge(2) is bonded to one Te(1), one Te(11), one Te(4), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Cu(8)Te4 tetrahedra. In the third Ge site, Ge(3) is bonded to one Te(12), one Te(2), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(1)Te4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one Te(10), one Te(3), one Te(6), and one Te(7) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Cu(7)Te4 tetrahedra. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(2), one Cu(4), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the second Te site, Te(2) is bonded to one Cu(3), one Cu(5), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(6), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fourth Te site, Te(4) is bonded to one Cu(1), one Cu(5), one Cu(7), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fifth Te site, Te(5) is bonded to one Cu(2), one Cu(6), one Cu(8), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(3), one Cu(4), one Ge(1), and one Ge(4) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the seventh Te site, Te(7) is bonded to one Cu(2), one Cu(5), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(4)Cu3Ge tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(3), one Cu(6), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(5)Cu3Ge tetrahedra. In the ninth Te site, Te(9) is bonded to one Cu(1), one Cu(4), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the tenth Te site, Te(10) is bonded to one Cu(1), one Cu(5), one Cu(8), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the eleventh Te site, Te(11) is bonded to one Cu(2), one Cu(6), one Ge(1), and one Ge(2) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the twelfth Te site, Te(12) is bonded to one Cu(3), one Cu(4), one Cu(7), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(9)Cu2Ge2 tetrahedra.
Ge1Cu2Te3 is Enargite-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(10), one Te(3), one Te(4), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. The Cu(1)-Te(10) bond length is 2.58 Å. The Cu(1)-Te(3) bond length is 2.58 Å. The Cu(1)-Te(4) bond length is 2.59 Å. The Cu(1)-Te(9) bond length is 2.57 Å. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(11), one Te(5), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. The Cu(2)-Te(1) bond length is 2.57 Å. The Cu(2)-Te(11) bond length is 2.58 Å. The Cu(2)-Te(5) bond length is 2.57 Å. The Cu(2)-Te(7) bond length is 2.59 Å. In the third Cu site, Cu(3) is bonded to one Te(12), one Te(2), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. The Cu(3)-Te(12) bond length is 2.58 Å. The Cu(3)-Te(2) bond length is 2.58 Å. The Cu(3)-Te(6) bond length is 2.58 Å. The Cu(3)-Te(8) bond length is 2.57 Å. In the fourth Cu site, Cu(4) is bonded to one Te(1), one Te(12), one Te(6), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. The Cu(4)-Te(1) bond length is 2.58 Å. The Cu(4)-Te(12) bond length is 2.61 Å. The Cu(4)-Te(6) bond length is 2.59 Å. The Cu(4)-Te(9) bond length is 2.59 Å. In the fifth Cu site, Cu(5) is bonded to one Te(10), one Te(2), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. The Cu(5)-Te(10) bond length is 2.61 Å. The Cu(5)-Te(2) bond length is 2.59 Å. The Cu(5)-Te(4) bond length is 2.59 Å. The Cu(5)-Te(7) bond length is 2.61 Å. In the sixth Cu site, Cu(6) is bonded to one Te(11), one Te(3), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. The Cu(6)-Te(11) bond length is 2.60 Å. The Cu(6)-Te(3) bond length is 2.60 Å. The Cu(6)-Te(5) bond length is 2.59 Å. The Cu(6)-Te(8) bond length is 2.61 Å. In the seventh Cu site, Cu(7) is bonded to one Te(12), one Te(3), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. The Cu(7)-Te(12) bond length is 2.57 Å. The Cu(7)-Te(3) bond length is 2.58 Å. The Cu(7)-Te(4) bond length is 2.58 Å. The Cu(7)-Te(7) bond length is 2.59 Å. In the eighth Cu site, Cu(8) is bonded to one Te(1), one Te(10), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. The Cu(8)-Te(1) bond length is 2.57 Å. The Cu(8)-Te(10) bond length is 2.58 Å. The Cu(8)-Te(5) bond length is 2.57 Å. The Cu(8)-Te(8) bond length is 2.57 Å. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(11), one Te(2), one Te(6), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. The Ge(1)-Te(11) bond length is 2.72 Å. The Ge(1)-Te(2) bond length is 2.74 Å. The Ge(1)-Te(6) bond length is 2.74 Å. The Ge(1)-Te(9) bond length is 2.73 Å. In the second Ge site, Ge(2) is bonded to one Te(1), one Te(11), one Te(4), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Cu(8)Te4 tetrahedra. The Ge(2)-Te(1) bond length is 2.67 Å. The Ge(2)-Te(11) bond length is 2.78 Å. The Ge(2)-Te(4) bond length is 2.68 Å. The Ge(2)-Te(8) bond length is 2.68 Å. In the third Ge site, Ge(3) is bonded to one Te(12), one Te(2), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(1)Te4 tetrahedra. The Ge(3)-Te(12) bond length is 2.68 Å. The Ge(3)-Te(2) bond length is 2.77 Å. The Ge(3)-Te(5) bond length is 2.67 Å. The Ge(3)-Te(9) bond length is 2.76 Å. In the fourth Ge site, Ge(4) is bonded to one Te(10), one Te(3), one Te(6), and one Te(7) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Cu(7)Te4 tetrahedra. The Ge(4)-Te(10) bond length is 2.69 Å. The Ge(4)-Te(3) bond length is 2.69 Å. The Ge(4)-Te(6) bond length is 2.77 Å. The Ge(4)-Te(7) bond length is 2.70 Å. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(2), one Cu(4), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the second Te site, Te(2) is bonded to one Cu(3), one Cu(5), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(6), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fourth Te site, Te(4) is bonded to one Cu(1), one Cu(5), one Cu(7), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fifth Te site, Te(5) is bonded to one Cu(2), one Cu(6), one Cu(8), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(3), one Cu(4), one Ge(1), and one Ge(4) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the seventh Te site, Te(7) is bonded to one Cu(2), one Cu(5), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(4)Cu3Ge tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(3), one Cu(6), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(5)Cu3Ge tetrahedra. In the ninth Te site, Te(9) is bonded to one Cu(1), one Cu(4), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the tenth Te site, Te(10) is bonded to one Cu(1), one Cu(5), one Cu(8), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the eleventh Te site, Te(11) is bonded to one Cu(2), one Cu(6), one Ge(1), and one Ge(2) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the twelfth Te site, Te(12) is bonded to one Cu(3), one Cu(4), one Cu(7), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(9)Cu2Ge2 tetrahedra.