Au4Al crystallizes in the monoclinic C2/m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 3-coordinate geometry to three equivalent Au(2) and three equivalent Al(1) atoms. In the second Au site, Au(2) is bonded in a distorted q6 geometry to three equivalent Au(1) and seven equivalent Au(2) atoms. Al(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms.
Au4Al crystallizes in the monoclinic C2/m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 3-coordinate geometry to three equivalent Au(2) and three equivalent Al(1) atoms. There is one shorter (2.96 Å) and two longer (2.97 Å) Au(1)-Au(2) bond lengths. There is one shorter (2.58 Å) and two longer (2.68 Å) Au(1)-Al(1) bond lengths. In the second Au site, Au(2) is bonded in a distorted q6 geometry to three equivalent Au(1) and seven equivalent Au(2) atoms. There are a spread of Au(2)-Au(2) bond distances ranging from 2.88-2.97 Å. Al(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms.