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YbAl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Yb is bonded to twelve equivalent Al atoms to form a mixture of corner and face-sharing YbAl12 cuboctahedra. All Yb–Al bond lengths are 3.03 Å. Al is bonded in a distorted square co-planar geometry to four equivalent Yb atoms.
YbAl2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Yb is bonded in a 12-coordinate geometry to twelve equivalent Al atoms. All Yb–Al bond lengths are 3.31 Å. Al is bonded to six equivalent Yb and six equivalent Al atoms to form a mixture of corner, edge, and face-sharing AlYb6Al6 cuboctahedra. All Al–Al bond lengths are 2.82 Å.
Yb3Al is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Yb sites. In the first Yb site, Yb is bonded to four equivalent Yb and four equivalent Al atoms to form a mixture of distorted corner, edge, and face-sharing YbYb4Al4 tetrahedra. All Yb–Yb bond lengths are 3.39 Å. All Yb–Al bond lengths are 3.39 Å. In the second Yb site, Yb is bonded in a body-centered cubic geometry to eight equivalent Yb atoms. Al is bonded in a body-centered cubic geometry to eight equivalent Yb atoms.