AlY2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. In the second Y site, Y(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to five equivalent Y(1) and five equivalent Y(2) atoms.
AlY2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to five equivalent Al(1) atoms. There are a spread of Y(1)-Al(1) bond distances ranging from 3.07-3.47 Å. In the second Y site, Y(2) is bonded in a 3-coordinate geometry to five equivalent Al(1) atoms. There are a spread of Y(2)-Al(1) bond distances ranging from 3.15-3.57 Å. Al(1) is bonded in a 10-coordinate geometry to five equivalent Y(1) and five equivalent Y(2) atoms.