Al13Cr4Si4 crystallizes in the cubic F-43m space group. Cr(1) is bonded in a 6-coordinate geometry to three equivalent Al(2), three equivalent Al(3), and three equivalent Si(1) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a tetrahedral geometry to four equivalent Si(1) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Cr(1), four equivalent Al(2), four equivalent Al(3), and two equivalent Si(1) atoms. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Cr(1), four equivalent Al(2), four equivalent Al(3), and two equivalent Si(1) atoms. Si(1) is bonded in a 10-coordinate geometry to three equivalent Cr(1), one Al(1), three equivalent Al(2), and three equivalent Al(3) atoms.
Al13Cr4Si4 crystallizes in the cubic F-43m space group. Cr(1) is bonded in a 6-coordinate geometry to three equivalent Al(2), three equivalent Al(3), and three equivalent Si(1) atoms. All Cr(1)-Al(2) bond lengths are 2.46 Å. All Cr(1)-Al(3) bond lengths are 2.76 Å. All Cr(1)-Si(1) bond lengths are 2.39 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a tetrahedral geometry to four equivalent Si(1) atoms. All Al(1)-Si(1) bond lengths are 2.41 Å. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Cr(1), four equivalent Al(2), four equivalent Al(3), and two equivalent Si(1) atoms. All Al(2)-Al(2) bond lengths are 2.94 Å. All Al(2)-Al(3) bond lengths are 2.88 Å. Both Al(2)-Si(1) bond lengths are 2.79 Å. In the third Al site, Al(3) is bonded in a 12-coordinate geometry to two equivalent Cr(1), four equivalent Al(2), four equivalent Al(3), and two equivalent Si(1) atoms. All Al(3)-Al(3) bond lengths are 2.95 Å. Both Al(3)-Si(1) bond lengths are 2.78 Å. Si(1) is bonded in a 10-coordinate geometry to three equivalent Cr(1), one Al(1), three equivalent Al(2), and three equivalent Al(3) atoms.