YbCu5Al7 crystallizes in the orthorhombic Imm2 space group. Yb(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 Yb(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 in a 12-coordinate geometry to two equivalent Yb(1), four equivalent Cu(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Yb(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 Yb(1), two equivalent Cu(2), four equivalent Cu(1), one Al(1), and two equivalent Al(5) atoms. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Yb(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 Yb(1), four equivalent Cu(1), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(5) atoms. In the fifth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Yb(1), one Cu(2), four equivalent Cu(1), one Al(1), one Al(2), one Al(4), and two equivalent Al(3) atoms.
YbCu5Al7 crystallizes in the orthorhombic Imm2 space group. Yb(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 Yb(1)-Cu(2) bond lengths are 3.18 Å. There are four shorter (3.30 Å) and four longer (3.31 Å) Yb(1)-Cu(1) bond lengths. The Yb(1)-Al(1) bond length is 3.02 Å. The Yb(1)-Al(2) bond length is 2.95 Å. Both Yb(1)-Al(3) bond lengths are 3.02 Å. Both Yb(1)-Al(4) bond lengths are 3.22 Å. All Yb(1)-Al(5) bond lengths are 3.13 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 12-coordinate geometry to two equivalent Yb(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 2.54 Å. There is one shorter (2.52 Å) and one longer (2.55 Å) Cu(1)-Cu(1) bond length. The Cu(1)-Al(1) bond length is 2.64 Å. The Cu(1)-Al(2) bond length is 2.65 Å. The Cu(1)-Al(4) bond length is 2.49 Å. There is one shorter (2.58 Å) and one longer (2.70 Å) Cu(1)-Al(3) bond length. There is one shorter (2.49 Å) and one longer (2.55 Å) Cu(1)-Al(5) bond length. In the second Cu site, Cu(2) is bonded in a 12-coordinate geometry to two equivalent Yb(1), four equivalent Cu(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms. Both Cu(2)-Al(2) bond lengths are 2.74 Å. Both Cu(2)-Al(3) bond lengths are 2.65 Å. Both Cu(2)-Al(5) bond lengths are 2.62 Å. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Yb(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 2.63 Å. Both Al(1)-Al(4) bond lengths are 2.74 Å. Both Al(1)-Al(5) bond lengths are 2.79 Å. In the second Al site, Al(2) is bonded in a 8-coordinate geometry to one Yb(1), two equivalent Cu(2), four equivalent Cu(1), one Al(1), and two equivalent Al(5) atoms. Both Al(2)-Al(5) bond lengths are 2.86 Å. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Yb(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 2.63 Å. The Al(3)-Al(4) bond length is 2.74 Å. Both Al(3)-Al(5) bond lengths are 2.80 Å. In the fourth Al site, Al(4) is bonded in a 4-coordinate geometry to two equivalent Yb(1), four equivalent Cu(1), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(5) atoms. Both Al(4)-Al(5) bond lengths are 2.73 Å. In the fifth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Yb(1), one Cu(2), four equivalent Cu(1), one Al(1), one Al(2), one Al(4), and two equivalent Al(3) atoms.