UCu5Al7 crystallizes in the orthorhombic Imm2 space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Cu(2), eight equivalent Cu(1), one Al(1), one Al(2), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(5) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 12-coordinate geometry to two equivalent U(1), one Cu(2), two equivalent Cu(1), one Al(1), one Al(2), one Al(4), two equivalent Al(3), and two equivalent Al(5) atoms. In the second Cu site, Cu(2) is bonded to two equivalent U(1), four equivalent Cu(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms to form distorted edge-sharing CuU2Al6Cu4 cuboctahedra. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one U(1), four equivalent Cu(1), one Al(2), two equivalent Al(4), and two equivalent Al(5) atoms. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to one U(1), two equivalent Cu(2), four equivalent Cu(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one U(1), one Cu(2), four equivalent Cu(1), one Al(3), one Al(4), and two equivalent Al(5) atoms. In the fourth Al site, Al(4) is bonded in a 4-coordinate geometry to two equivalent U(1), four equivalent Cu(1), two equivalent Al(1), and two equivalent Al(3) atoms. In the fifth Al site, Al(5) is bonded in a 5-coordinate geometry to two equivalent U(1), one Cu(2), four equivalent Cu(1), one Al(1), and two equivalent Al(3) atoms.
UCu5Al7 crystallizes in the orthorhombic Imm2 space group. U(1) is bonded in a 20-coordinate geometry to two equivalent Cu(2), eight equivalent Cu(1), one Al(1), one Al(2), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(5) atoms. Both U(1)-Cu(2) bond lengths are 3.22 Å. There are four shorter (3.30 Å) and four longer (3.34 Å) U(1)-Cu(1) bond lengths. The U(1)-Al(1) bond length is 3.01 Å. The U(1)-Al(2) bond length is 2.98 Å. Both U(1)-Al(3) bond lengths are 3.03 Å. Both U(1)-Al(4) bond lengths are 3.20 Å. All U(1)-Al(5) bond lengths are 3.14 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 12-coordinate geometry to two equivalent U(1), one Cu(2), two equivalent Cu(1), one Al(1), one Al(2), one Al(4), two equivalent Al(3), and two equivalent Al(5) atoms. The Cu(1)-Cu(2) bond length is 2.55 Å. There is one shorter (2.53 Å) and one longer (2.56 Å) Cu(1)-Cu(1) bond length. The Cu(1)-Al(1) bond length is 2.66 Å. The Cu(1)-Al(2) bond length is 2.66 Å. The Cu(1)-Al(4) bond length is 2.51 Å. There is one shorter (2.59 Å) and one longer (2.70 Å) Cu(1)-Al(3) bond length. There is one shorter (2.50 Å) and one longer (2.56 Å) Cu(1)-Al(5) bond length. In the second Cu site, Cu(2) is bonded to two equivalent U(1), four equivalent Cu(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms to form distorted edge-sharing CuU2Al6Cu4 cuboctahedra. Both Cu(2)-Al(2) bond lengths are 2.73 Å. Both Cu(2)-Al(3) bond lengths are 2.64 Å. Both Cu(2)-Al(5) bond lengths are 2.65 Å. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one U(1), four equivalent Cu(1), one Al(2), two equivalent Al(4), and two equivalent Al(5) atoms. The Al(1)-Al(2) bond length is 2.64 Å. Both Al(1)-Al(4) bond lengths are 2.75 Å. Both Al(1)-Al(5) bond lengths are 2.81 Å. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to one U(1), two equivalent Cu(2), four equivalent Cu(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one U(1), one Cu(2), four equivalent Cu(1), one Al(3), one Al(4), and two equivalent Al(5) atoms. The Al(3)-Al(3) bond length is 2.66 Å. The Al(3)-Al(4) bond length is 2.76 Å. Both Al(3)-Al(5) bond lengths are 2.81 Å. In the fourth Al site, Al(4) is bonded in a 4-coordinate geometry to two equivalent U(1), four equivalent Cu(1), two equivalent Al(1), and two equivalent Al(3) atoms. In the fifth Al site, Al(5) is bonded in a 5-coordinate geometry to two equivalent U(1), one Cu(2), four equivalent Cu(1), one Al(1), and two equivalent Al(3) atoms.