UAu2Al2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Au(2), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent U(1) and four equivalent Al(2) atoms to form distorted AuU4Al4 tetrahedra that share corners with twelve equivalent Al(1)U4Au4 tetrahedra, edges with two equivalent Al(1)U4Au4 tetrahedra, edges with four equivalent Au(1)U4Al4 tetrahedra, and faces with four equivalent Au(1)U4Al4 tetrahedra. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent U(1), one Al(2), and four equivalent Al(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent U(1) and four equivalent Au(2) atoms to form AlU4Au4 tetrahedra that share corners with twelve equivalent Au(1)U4Al4 tetrahedra, edges with two equivalent Au(1)U4Al4 tetrahedra, edges with four equivalent Al(1)U4Au4 tetrahedra, and faces with four equivalent Al(1)U4Au4 tetrahedra. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to four equivalent U(1), one Au(2), and four equivalent Au(1) atoms.
UAu2Al2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Au(1), four equivalent Au(2), four equivalent Al(1), and four equivalent Al(2) atoms. All U(1)-Au(1) bond lengths are 3.38 Å. All U(1)-Au(2) bond lengths are 3.31 Å. All U(1)-Al(1) bond lengths are 3.41 Å. All U(1)-Al(2) bond lengths are 3.29 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent U(1) and four equivalent Al(2) atoms to form distorted AuU4Al4 tetrahedra that share corners with twelve equivalent Al(1)U4Au4 tetrahedra, edges with two equivalent Al(1)U4Au4 tetrahedra, edges with four equivalent Au(1)U4Al4 tetrahedra, and faces with four equivalent Au(1)U4Al4 tetrahedra. All Au(1)-Al(2) bond lengths are 2.58 Å. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent U(1), one Al(2), and four equivalent Al(1) atoms. The Au(2)-Al(2) bond length is 2.44 Å. All Au(2)-Al(1) bond lengths are 2.57 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent U(1) and four equivalent Au(2) atoms to form AlU4Au4 tetrahedra that share corners with twelve equivalent Au(1)U4Al4 tetrahedra, edges with two equivalent Au(1)U4Al4 tetrahedra, edges with four equivalent Al(1)U4Au4 tetrahedra, and faces with four equivalent Al(1)U4Au4 tetrahedra. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to four equivalent U(1), one Au(2), and four equivalent Au(1) atoms.