Pr(AuAl)2 crystallizes in the tetragonal P4/nmm space group. Pr(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 Pr(1) and four equivalent Al(2) atoms to form distorted AuPr4Al4 tetrahedra that share corners with twelve equivalent Al(1)Pr4Au4 tetrahedra, edges with two equivalent Al(1)Pr4Au4 tetrahedra, edges with four equivalent Au(1)Pr4Al4 tetrahedra, and faces with four equivalent Au(1)Pr4Al4 tetrahedra. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent Pr(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 Pr(1) and four equivalent Au(2) atoms to form distorted AlPr4Au4 tetrahedra that share corners with twelve equivalent Au(1)Pr4Al4 tetrahedra, edges with two equivalent Au(1)Pr4Al4 tetrahedra, edges with four equivalent Al(1)Pr4Au4 tetrahedra, and faces with four equivalent Al(1)Pr4Au4 tetrahedra. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to four equivalent Pr(1), one Au(2), and four equivalent Au(1) atoms.
Pr(AuAl)2 crystallizes in the tetragonal P4/nmm space group. Pr(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 Pr(1)-Au(1) bond lengths are 3.41 Å. All Pr(1)-Au(2) bond lengths are 3.37 Å. All Pr(1)-Al(1) bond lengths are 3.43 Å. All Pr(1)-Al(2) bond lengths are 3.36 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent Pr(1) and four equivalent Al(2) atoms to form distorted AuPr4Al4 tetrahedra that share corners with twelve equivalent Al(1)Pr4Au4 tetrahedra, edges with two equivalent Al(1)Pr4Au4 tetrahedra, edges with four equivalent Au(1)Pr4Al4 tetrahedra, and faces with four equivalent Au(1)Pr4Al4 tetrahedra. All Au(1)-Al(2) bond lengths are 2.59 Å. In the second Au site, Au(2) is bonded in a 5-coordinate geometry to four equivalent Pr(1), one Al(2), and four equivalent Al(1) atoms. The Au(2)-Al(2) bond length is 2.51 Å. All Au(2)-Al(1) bond lengths are 2.59 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Pr(1) and four equivalent Au(2) atoms to form distorted AlPr4Au4 tetrahedra that share corners with twelve equivalent Au(1)Pr4Al4 tetrahedra, edges with two equivalent Au(1)Pr4Al4 tetrahedra, edges with four equivalent Al(1)Pr4Au4 tetrahedra, and faces with four equivalent Al(1)Pr4Au4 tetrahedra. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to four equivalent Pr(1), one Au(2), and four equivalent Au(1) atoms.