La2AuCuAl6 crystallizes in the tetragonal P4mm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Al(1), four equivalent Al(2), and four equivalent Al(4) atoms. In the second La site, La(2) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Al(1), four equivalent Al(2), and four equivalent Al(3) atoms. Au(1) is bonded in a 5-coordinate geometry to four equivalent La(2), one Al(3), and four equivalent Al(2) atoms. Cu(1) is bonded in a 5-coordinate geometry to four equivalent La(1), one Al(4), and four equivalent Al(1) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), and two equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), and two equivalent Au(1) atoms. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to four equivalent La(2) and one Au(1) atom. In the fourth Al site, Al(4) is bonded in a distorted single-bond geometry to four equivalent La(1) and one Cu(1) atom.
La2AuCuAl6 crystallizes in the tetragonal P4mm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Al(1), four equivalent Al(2), and four equivalent Al(4) atoms. All La(1)-Cu(1) bond lengths are 3.40 Å. All La(1)-Al(1) bond lengths are 3.45 Å. All La(1)-Al(2) bond lengths are 3.41 Å. All La(1)-Al(4) bond lengths are 3.22 Å. In the second La site, La(2) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Al(1), four equivalent Al(2), and four equivalent Al(3) atoms. All La(2)-Au(1) bond lengths are 3.42 Å. All La(2)-Al(1) bond lengths are 3.44 Å. All La(2)-Al(2) bond lengths are 3.61 Å. All La(2)-Al(3) bond lengths are 3.24 Å. Au(1) is bonded in a 5-coordinate geometry to four equivalent La(2), one Al(3), and four equivalent Al(2) atoms. The Au(1)-Al(3) bond length is 2.53 Å. All Au(1)-Al(2) bond lengths are 2.57 Å. Cu(1) is bonded in a 5-coordinate geometry to four equivalent La(1), one Al(4), and four equivalent Al(1) atoms. The Cu(1)-Al(4) bond length is 2.43 Å. All Cu(1)-Al(1) bond lengths are 2.50 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), and two equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), and two equivalent Au(1) atoms. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to four equivalent La(2) and one Au(1) atom. In the fourth Al site, Al(4) is bonded in a distorted single-bond geometry to four equivalent La(1) and one Cu(1) atom.