GdCuAl crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 11-coordinate geometry to one Cu(2), four equivalent Cu(1), two equivalent Al(2), and four equivalent Al(1) atoms. In the second Gd site, Gd(2) is bonded in a 11-coordinate geometry to one Cu(2), four equivalent Cu(1), two equivalent Al(2), and four equivalent Al(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), one Al(2), and two equivalent Al(1) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to one Gd(2), two equivalent Gd(1), two equivalent Al(2), and four equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(1), and one Al(2) atom. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Al(1) atoms.
GdCuAl crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 11-coordinate geometry to one Cu(2), four equivalent Cu(1), two equivalent Al(2), and four equivalent Al(1) atoms. The Gd(1)-Cu(2) bond length is 2.94 Å. There are two shorter (2.92 Å) and two longer (2.94 Å) Gd(1)-Cu(1) bond lengths. Both Gd(1)-Al(2) bond lengths are 3.25 Å. There are two shorter (3.20 Å) and two longer (3.25 Å) Gd(1)-Al(1) bond lengths. In the second Gd site, Gd(2) is bonded in a 11-coordinate geometry to one Cu(2), four equivalent Cu(1), two equivalent Al(2), and four equivalent Al(1) atoms. The Gd(2)-Cu(2) bond length is 2.94 Å. All Gd(2)-Cu(1) bond lengths are 2.92 Å. Both Gd(2)-Al(2) bond lengths are 3.21 Å. All Gd(2)-Al(1) bond lengths are 3.25 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), one Al(2), and two equivalent Al(1) atoms. The Cu(1)-Al(2) bond length is 2.80 Å. There is one shorter (2.78 Å) and one longer (2.79 Å) Cu(1)-Al(1) bond length. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to one Gd(2), two equivalent Gd(1), two equivalent Al(2), and four equivalent Al(1) atoms. Both Cu(2)-Al(2) bond lengths are 2.59 Å. All Cu(2)-Al(1) bond lengths are 2.59 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(1), and one Al(2) atom. The Al(1)-Al(1) bond length is 2.83 Å. The Al(1)-Al(2) bond length is 2.83 Å. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Gd(2), four equivalent Gd(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Al(1) atoms.