Al3Y5 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. Al(1) is bonded in a 9-coordinate geometry to four equivalent Y(1) and five equivalent Y(2) atoms.
Al3Y5 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. All Y(1)-Al(1) bond lengths are 3.16 Å. In the second Y site, Y(2) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. There are a spread of Y(2)-Al(1) bond distances ranging from 3.07-3.50 Å. Al(1) is bonded in a 9-coordinate geometry to four equivalent Y(1) and five equivalent Y(2) atoms.