La5Au3Cu2Al15 crystallizes in the tetragonal I4mm space group. There are five 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(10), four equivalent Al(5), and four equivalent Al(6) atoms. In the second La site, La(2) is bonded in a 16-coordinate geometry to four equivalent Cu(2), four equivalent Al(1), four equivalent Al(6), and four equivalent Al(7) atoms. In the third La site, La(3) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Al(2), four equivalent Al(7), and four equivalent Al(8) atoms. In the fourth La site, La(4) is bonded in a 16-coordinate geometry to four equivalent Au(2), four equivalent Al(3), four equivalent Al(8), and four equivalent Al(9) atoms. In the fifth La site, La(5) is bonded in a 16-coordinate geometry to four equivalent Au(3), four equivalent Al(10), four equivalent Al(4), and four equivalent Al(9) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to four equivalent La(3), one Al(2), and four equivalent Al(8) atoms. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent La(4), one Al(3), and four equivalent Al(9) atoms. In the third Au site, Au(3) is bonded in a 5-coordinate geometry to four equivalent La(5), one Al(4), and four equivalent Al(10) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to four equivalent La(1), one Al(5), and four equivalent Al(6) atoms. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to four equivalent La(2), one Al(1), and four equivalent Al(7) atoms. There are ten inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted single-bond geometry to four equivalent La(2), one Cu(2), and four equivalent Al(6) atoms. In the second Al site, Al(2) is bonded in a distorted single-bond geometry to four equivalent La(3) and one Au(1) atom. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to four equivalent La(4) and one Au(2) atom. In the fourth Al site, Al(4) is bonded in a distorted single-bond geometry to four equivalent La(5) and one Au(3) atom. In the fifth Al site, Al(5) is bonded in a distorted single-bond geometry to four equivalent La(1) and one Cu(1) atom. In the sixth Al site, Al(6) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), two equivalent Cu(1), and two equivalent Al(1) atoms. In the seventh Al site, Al(7) is bonded in a distorted bent 120 degrees geometry to two equivalent La(2), two equivalent La(3), and two equivalent Cu(2) atoms. In the eighth Al site, Al(8) is bonded in a distorted bent 120 degrees geometry to two equivalent La(3), two equivalent La(4), and two equivalent Au(1) atoms. In the ninth Al site, Al(9) is bonded in a distorted bent 120 degrees geometry to two equivalent La(4), two equivalent La(5), and two equivalent Au(2) atoms. In the tenth Al site, Al(10) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(5), and two equivalent Au(3) atoms.
La5Au3Cu2Al15 crystallizes in the tetragonal I4mm space group. There are five 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(10), four equivalent Al(5), and four equivalent Al(6) atoms. All La(1)-Cu(1) bond lengths are 3.42 Å. All La(1)-Al(10) bond lengths are 3.39 Å. All La(1)-Al(5) bond lengths are 3.24 Å. All La(1)-Al(6) bond lengths are 3.48 Å. In the second La site, La(2) is bonded in a 16-coordinate geometry to four equivalent Cu(2), four equivalent Al(1), four equivalent Al(6), and four equivalent Al(7) atoms. All La(2)-Cu(2) bond lengths are 3.42 Å. All La(2)-Al(1) bond lengths are 3.25 Å. All La(2)-Al(6) bond lengths are 3.45 Å. All La(2)-Al(7) bond lengths are 3.47 Å. In the third La site, La(3) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Al(2), four equivalent Al(7), and four equivalent Al(8) atoms. All La(3)-Au(1) bond lengths are 3.43 Å. All La(3)-Al(2) bond lengths are 3.26 Å. All La(3)-Al(7) bond lengths are 3.43 Å. All La(3)-Al(8) bond lengths are 3.58 Å. In the fourth La site, La(4) is bonded in a 16-coordinate geometry to four equivalent Au(2), four equivalent Al(3), four equivalent Al(8), and four equivalent Al(9) atoms. All La(4)-Au(2) bond lengths are 3.43 Å. All La(4)-Al(3) bond lengths are 3.25 Å. All La(4)-Al(8) bond lengths are 3.38 Å. All La(4)-Al(9) bond lengths are 3.58 Å. In the fifth La site, La(5) is bonded in a 16-coordinate geometry to four equivalent Au(3), four equivalent Al(10), four equivalent Al(4), and four equivalent Al(9) atoms. All La(5)-Au(3) bond lengths are 3.44 Å. All La(5)-Al(10) bond lengths are 3.61 Å. All La(5)-Al(4) bond lengths are 3.24 Å. All La(5)-Al(9) bond lengths are 3.37 Å. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to four equivalent La(3), one Al(2), and four equivalent Al(8) atoms. The Au(1)-Al(2) bond length is 2.52 Å. All Au(1)-Al(8) bond lengths are 2.57 Å. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent La(4), one Al(3), and four equivalent Al(9) atoms. The Au(2)-Al(3) bond length is 2.50 Å. All Au(2)-Al(9) bond lengths are 2.56 Å. In the third Au site, Au(3) is bonded in a 5-coordinate geometry to four equivalent La(5), one Al(4), and four equivalent Al(10) atoms. The Au(3)-Al(4) bond length is 2.50 Å. All Au(3)-Al(10) bond lengths are 2.57 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to four equivalent La(1), one Al(5), and four equivalent Al(6) atoms. The Cu(1)-Al(5) bond length is 2.43 Å. All Cu(1)-Al(6) bond lengths are 2.51 Å. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to four equivalent La(2), one Al(1), and four equivalent Al(7) atoms. The Cu(2)-Al(1) bond length is 2.46 Å. All Cu(2)-Al(7) bond lengths are 2.51 Å. There are ten inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted single-bond geometry to four equivalent La(2), one Cu(2), and four equivalent Al(6) atoms. All Al(1)-Al(6) bond lengths are 2.75 Å. In the second Al site, Al(2) is bonded in a distorted single-bond geometry to four equivalent La(3) and one Au(1) atom. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to four equivalent La(4) and one Au(2) atom. In the fourth Al site, Al(4) is bonded in a distorted single-bond geometry to four equivalent La(5) and one Au(3) atom. In the fifth Al site, Al(5) is bonded in a distorted single-bond geometry to four equivalent La(1) and one Cu(1) atom. In the sixth Al site, Al(6) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(2), two equivalent Cu(1), and two equivalent Al(1) atoms. In the seventh Al site, Al(7) is bonded in a distorted bent 120 degrees geometry to two equivalent La(2), two equivalent La(3), and two equivalent Cu(2) atoms. In the eighth Al site, Al(8) is bonded in a distorted bent 120 degrees geometry to two equivalent La(3), two equivalent La(4), and two equivalent Au(1) atoms. In the ninth Al site, Al(9) is bonded in a distorted bent 120 degrees geometry to two equivalent La(4), two equivalent La(5), and two equivalent Au(2) atoms. In the tenth Al site, Al(10) is bonded in a distorted bent 120 degrees geometry to two equivalent La(1), two equivalent La(5), and two equivalent Au(3) atoms.