BeLaAl3 crystallizes in the tetragonal I-4m2 space group. Be(1) is bonded to four equivalent La(1) and four equivalent Al(2) atoms to form a mixture of distorted edge and corner-sharing BeLa4Al4 tetrahedra. La(1) is bonded in a 16-coordinate geometry to four equivalent Be(1), four equivalent Al(1), and eight equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Be(1), four equivalent La(1), one Al(2), and two equivalent Al(1) atoms.
BeLaAl3 crystallizes in the tetragonal I-4m2 space group. Be(1) is bonded to four equivalent La(1) and four equivalent Al(2) atoms to form a mixture of distorted edge and corner-sharing BeLa4Al4 tetrahedra. All Be(1)-La(1) bond lengths are 3.44 Å. All Be(1)-Al(2) bond lengths are 2.55 Å. La(1) is bonded in a 16-coordinate geometry to four equivalent Be(1), four equivalent Al(1), and eight equivalent Al(2) atoms. All La(1)-Al(1) bond lengths are 3.44 Å. All La(1)-Al(2) bond lengths are 3.28 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent Al(2) atoms. All Al(1)-Al(2) bond lengths are 2.55 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Be(1), four equivalent La(1), one Al(2), and two equivalent Al(1) atoms. The Al(2)-Al(2) bond length is 2.59 Å.