YFe2Al3 crystallizes in the monoclinic C2 space group. Y(1) is bonded in a 11-coordinate geometry to two equivalent Y(1), four equivalent Fe(1), one Al(1), and four equivalent Al(2) atoms. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Y(1), two equivalent Fe(1), two equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to one Y(1), four equivalent Fe(1), two equivalent Al(1), and two equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), four equivalent Fe(1), one Al(1), and two equivalent Al(2) atoms.
YFe2Al3 crystallizes in the monoclinic C2 space group. Y(1) is bonded in a 11-coordinate geometry to two equivalent Y(1), four equivalent Fe(1), one Al(1), and four equivalent Al(2) atoms. Both Y(1)-Y(1) bond lengths are 2.72 Å. There are two shorter (3.03 Å) and two longer (3.04 Å) Y(1)-Fe(1) bond lengths. The Y(1)-Al(1) bond length is 3.20 Å. There are two shorter (3.08 Å) and two longer (3.29 Å) Y(1)-Al(2) bond lengths. Fe(1) is bonded in a 10-coordinate geometry to two equivalent Y(1), two equivalent Fe(1), two equivalent Al(1), and four equivalent Al(2) atoms. Both Fe(1)-Fe(1) bond lengths are 2.72 Å. Both Fe(1)-Al(1) bond lengths are 2.47 Å. There are a spread of Fe(1)-Al(2) bond distances ranging from 2.45-2.51 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to one Y(1), four equivalent Fe(1), two equivalent Al(1), and two equivalent Al(2) atoms. Both Al(1)-Al(1) bond lengths are 2.72 Å. Both Al(1)-Al(2) bond lengths are 2.82 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Y(1), four equivalent Fe(1), one Al(1), and two equivalent Al(2) atoms. Both Al(2)-Al(2) bond lengths are 2.72 Å.