Lu3Al2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a distorted square co-planar geometry to four equivalent Al(1) atoms. In the second Lu site, Lu(3) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. In the third Lu site, Lu(2) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Lu(1), three equivalent Lu(2), three equivalent Lu(3), and two equivalent Al(1) atoms.
Lu3Al2 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a distorted square co-planar geometry to four equivalent Al(1) atoms. All Lu(1)-Al(1) bond lengths are 3.21 Å. In the second Lu site, Lu(3) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. There are two shorter (3.02 Å) and four longer (3.04 Å) Lu(3)-Al(1) bond lengths. In the third Lu site, Lu(2) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. There are two shorter (2.98 Å) and four longer (3.13 Å) Lu(2)-Al(1) bond lengths. Al(1) is bonded in a 10-coordinate geometry to two equivalent Lu(1), three equivalent Lu(2), three equivalent Lu(3), and two equivalent Al(1) atoms. There is one shorter (2.70 Å) and one longer (2.96 Å) Al(1)-Al(1) bond length.