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YAl crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Y is bonded in a 7-coordinate geometry to seven equivalent Al atoms. There are a spread of Y–Al bond distances ranging from 3.09–3.24 Å. Al is bonded in a 9-coordinate geometry to seven equivalent Y and two equivalent Al atoms. Both Al–Al bond lengths are 2.76 Å.
YAl is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Y is bonded in a body-centered cubic geometry to eight equivalent Al atoms. All Y–Al bond lengths are 3.12 Å. Al is bonded in a body-centered cubic geometry to eight equivalent Y atoms.
AlY2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded in a 5-coordinate geometry to five equivalent Al atoms. There are a spread of Y–Al bond distances ranging from 3.07–3.47 Å. In the second Y site, Y is bonded in a 3-coordinate geometry to five equivalent Al atoms. There are a spread of Y–Al bond distances ranging from 3.16–3.57 Å. Al is bonded in a 10-coordinate geometry to ten Y atoms.
Y3Al2 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are three inequivalent Y sites. In the first Y site, Y is bonded in a distorted square co-planar geometry to four equivalent Al atoms. All Y–Al bond lengths are 3.32 Å. In the second Y site, Y is bonded in a 6-coordinate geometry to six equivalent Al atoms. There are four shorter (3.11 Å) and two longer (3.13 Å) Y–Al bond lengths. In the third Y site, Y is bonded in a 6-coordinate geometry to six equivalent Al atoms. There are two shorter (3.07 Å) and four longer (3.23 Å) Y–Al bond lengths. Al is bonded in a 10-coordinate geometry to eight Y and two equivalent Al atoms. There are one shorter (2.77 Å) and one longer (3.02 Å) Al–Al bond lengths.
Al2Y is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Y is bonded in a 12-coordinate geometry to four equivalent Y and twelve equivalent Al atoms. All Y–Y bond lengths are 3.41 Å. All Y–Al bond lengths are 3.27 Å. Al is bonded to six equivalent Y and six equivalent Al atoms to form a mixture of edge, face, and corner-sharing AlY6Al6 cuboctahedra. All Al–Al bond lengths are 2.79 Å.
Al3Y crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded to twelve Al atoms to form a mixture of corner and face-sharing YAl12 cuboctahedra. There are a spread of Y–Al bond distances ranging from 3.03–3.11 Å. In the second Y site, Y is bonded to twelve Al atoms to form a mixture of corner and face-sharing YAl12 cuboctahedra. There are six shorter (3.08 Å) and six longer (3.10 Å) Y–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 10-coordinate geometry to four Y and six Al atoms. There are a spread of Al–Al bond distances ranging from 2.72–2.89 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to four Y and eight Al atoms. All Al–Al bond lengths are 3.10 Å.
Y3Al is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Y is bonded to eight equivalent Y and four equivalent Al atoms to form YY8Al4 cuboctahedra that share corners with twelve equivalent YY8Al4 cuboctahedra, edges with eight equivalent AlY12 cuboctahedra, edges with sixteen equivalent YY8Al4 cuboctahedra, faces with four equivalent AlY12 cuboctahedra, and faces with fourteen equivalent YY8Al4 cuboctahedra. All Y–Y bond lengths are 3.38 Å. All Y–Al bond lengths are 3.38 Å. Al is bonded to twelve equivalent Y atoms to form AlY12 cuboctahedra that share corners with twelve equivalent AlY12 cuboctahedra, edges with twenty-four equivalent YY8Al4 cuboctahedra, faces with six equivalent AlY12 cuboctahedra, and faces with twelve equivalent YY8Al4 cuboctahedra.
Al3Y crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Y is bonded to twelve equivalent Al atoms to form a mixture of distorted face and corner-sharing YAl12 cuboctahedra. There are six shorter (3.08 Å) and six longer (3.14 Å) Y–Al bond lengths. Al is bonded in a 10-coordinate geometry to four equivalent Y and six equivalent Al atoms. There are two shorter (2.76 Å) and four longer (2.81 Å) Al–Al bond lengths.