U4CuTe12 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one Te(10), one Te(11), one Te(12), one Te(3), one Te(4), one Te(7), one Te(8), and one Te(9) atom. In the second U site, U(2) is bonded in a 8-coordinate geometry to one Te(10), one Te(11), one Te(12), one Te(3), one Te(4), one Te(7), one Te(8), and one Te(9) atom. In the third U site, U(3) is bonded in a 8-coordinate geometry to one Te(1), one Te(10), one Te(11), one Te(12), one Te(2), one Te(5), one Te(6), and one Te(9) atom. In the fourth U site, U(4) is bonded in a 8-coordinate geometry to one Te(1), one Te(10), one Te(11), one Te(12), one Te(2), one Te(5), one Te(6), and one Te(9) atom. Cu(1) is bonded in a 4-coordinate geometry to one Te(1), one Te(3), one Te(4), and one Te(6) atom. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one U(3), one U(4), one Cu(1), and one Te(5) atom. In the second Te site, Te(2) is bonded in a 4-coordinate geometry to one U(3), one U(4), one Te(5), and one Te(6) atom. In the third Te site, Te(3) is bonded in a 5-coordinate geometry to one U(1), one U(2), one Cu(1), one Te(7), and one Te(8) atom. In the fourth Te site, Te(4) is bonded in a 5-coordinate geometry to one U(1), one U(2), one Cu(1), one Te(7), and one Te(8) atom. In the fifth Te site, Te(5) is bonded in a 4-coordinate geometry to one U(3), one U(4), one Te(1), and one Te(2) atom. In the sixth Te site, Te(6) is bonded in a 3-coordinate geometry to one U(3), one U(4), one Cu(1), and one Te(2) atom. In the seventh Te site, Te(7) is bonded in a 4-coordinate geometry to one U(1), one U(2), one Te(3), and one Te(4) atom. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to one U(1), one U(2), one Te(3), and one Te(4) atom. In the ninth Te site, Te(9) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the tenth Te site, Te(10) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the eleventh Te site, Te(11) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the twelfth Te site, Te(12) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids.
U4CuTe12 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 8-coordinate geometry to one Te(10), one Te(11), one Te(12), one Te(3), one Te(4), one Te(7), one Te(8), and one Te(9) atom. The U(1)-Te(10) bond length is 3.23 Å. The U(1)-Te(11) bond length is 3.13 Å. The U(1)-Te(12) bond length is 3.13 Å. The U(1)-Te(3) bond length is 3.18 Å. The U(1)-Te(4) bond length is 3.18 Å. The U(1)-Te(7) bond length is 3.15 Å. The U(1)-Te(8) bond length is 3.15 Å. The U(1)-Te(9) bond length is 3.25 Å. In the second U site, U(2) is bonded in a 8-coordinate geometry to one Te(10), one Te(11), one Te(12), one Te(3), one Te(4), one Te(7), one Te(8), and one Te(9) atom. The U(2)-Te(10) bond length is 3.20 Å. The U(2)-Te(11) bond length is 3.11 Å. The U(2)-Te(12) bond length is 3.11 Å. The U(2)-Te(3) bond length is 3.22 Å. The U(2)-Te(4) bond length is 3.22 Å. The U(2)-Te(7) bond length is 3.13 Å. The U(2)-Te(8) bond length is 3.13 Å. The U(2)-Te(9) bond length is 3.24 Å. In the third U site, U(3) is bonded in a 8-coordinate geometry to one Te(1), one Te(10), one Te(11), one Te(12), one Te(2), one Te(5), one Te(6), and one Te(9) atom. The U(3)-Te(1) bond length is 3.17 Å. The U(3)-Te(10) bond length is 3.12 Å. The U(3)-Te(11) bond length is 3.24 Å. The U(3)-Te(12) bond length is 3.24 Å. The U(3)-Te(2) bond length is 3.13 Å. The U(3)-Te(5) bond length is 3.15 Å. The U(3)-Te(6) bond length is 3.19 Å. The U(3)-Te(9) bond length is 3.14 Å. In the fourth U site, U(4) is bonded in a 8-coordinate geometry to one Te(1), one Te(10), one Te(11), one Te(12), one Te(2), one Te(5), one Te(6), and one Te(9) atom. The U(4)-Te(1) bond length is 3.18 Å. The U(4)-Te(10) bond length is 3.11 Å. The U(4)-Te(11) bond length is 3.23 Å. The U(4)-Te(12) bond length is 3.23 Å. The U(4)-Te(2) bond length is 3.14 Å. The U(4)-Te(5) bond length is 3.16 Å. The U(4)-Te(6) bond length is 3.19 Å. The U(4)-Te(9) bond length is 3.13 Å. Cu(1) is bonded in a 4-coordinate geometry to one Te(1), one Te(3), one Te(4), and one Te(6) atom. The Cu(1)-Te(1) bond length is 2.59 Å. The Cu(1)-Te(3) bond length is 2.57 Å. The Cu(1)-Te(4) bond length is 2.57 Å. The Cu(1)-Te(6) bond length is 2.62 Å. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 3-coordinate geometry to one U(3), one U(4), one Cu(1), and one Te(5) atom. The Te(1)-Te(5) bond length is 3.14 Å. In the second Te site, Te(2) is bonded in a 4-coordinate geometry to one U(3), one U(4), one Te(5), and one Te(6) atom. The Te(2)-Te(5) bond length is 2.88 Å. The Te(2)-Te(6) bond length is 3.17 Å. In the third Te site, Te(3) is bonded in a 5-coordinate geometry to one U(1), one U(2), one Cu(1), one Te(7), and one Te(8) atom. The Te(3)-Te(7) bond length is 3.14 Å. The Te(3)-Te(8) bond length is 2.94 Å. In the fourth Te site, Te(4) is bonded in a 5-coordinate geometry to one U(1), one U(2), one Cu(1), one Te(7), and one Te(8) atom. The Te(4)-Te(7) bond length is 2.94 Å. The Te(4)-Te(8) bond length is 3.15 Å. In the fifth Te site, Te(5) is bonded in a 4-coordinate geometry to one U(3), one U(4), one Te(1), and one Te(2) atom. In the sixth Te site, Te(6) is bonded in a 3-coordinate geometry to one U(3), one U(4), one Cu(1), and one Te(2) atom. In the seventh Te site, Te(7) is bonded in a 4-coordinate geometry to one U(1), one U(2), one Te(3), and one Te(4) atom. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to one U(1), one U(2), one Te(3), and one Te(4) atom. In the ninth Te site, Te(9) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the tenth Te site, Te(10) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the eleventh Te site, Te(11) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids. In the twelfth Te site, Te(12) is bonded to one U(1), one U(2), one U(3), and one U(4) atom to form a mixture of distorted corner and edge-sharing TeU4 trigonal pyramids.