LuAu3Al7 crystallizes in the trigonal R-3c space group. Lu(1) is bonded in a 18-coordinate geometry to six equivalent Au(1) and twelve equivalent Al(1) atoms. Au(1) is bonded in a 9-coordinate geometry to two equivalent Lu(1), one Al(2), and six equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to two equivalent Lu(1) and three equivalent Au(1) atoms. In the second Al site, Al(2) is bonded in a trigonal planar geometry to three equivalent Au(1) atoms.
LuAu3Al7 crystallizes in the trigonal R-3c space group. Lu(1) is bonded in a 18-coordinate geometry to six equivalent Au(1) and twelve equivalent Al(1) atoms. All Lu(1)-Au(1) bond lengths are 3.21 Å. There are six shorter (3.28 Å) and six longer (3.34 Å) Lu(1)-Al(1) bond lengths. Au(1) is bonded in a 9-coordinate geometry to two equivalent Lu(1), one Al(2), and six equivalent Al(1) atoms. The Au(1)-Al(2) bond length is 2.61 Å. There are a spread of Au(1)-Al(1) bond distances ranging from 2.56-2.64 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to two equivalent Lu(1) and three equivalent Au(1) atoms. In the second Al site, Al(2) is bonded in a trigonal planar geometry to three equivalent Au(1) atoms.