LuAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a 6-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. In the second Lu site, Lu(2) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Lu(1), four equivalent Lu(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlLu8Al4 cuboctahedra. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to four equivalent Lu(1), four equivalent Lu(2), and two equivalent Al(1) atoms.
LuAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded in a 6-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two shorter (3.13 Å) and two longer (3.47 Å) Lu(1)-Al(1) bond lengths. There are a spread of Lu(1)-Al(2) bond distances ranging from 2.97-3.23 Å. In the second Lu site, Lu(2) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two shorter (3.21 Å) and two longer (3.32 Å) Lu(2)-Al(1) bond lengths. There are a spread of Lu(2)-Al(2) bond distances ranging from 2.98-3.20 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Lu(1), four equivalent Lu(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlLu8Al4 cuboctahedra. Both Al(1)-Al(1) bond lengths are 2.75 Å. Both Al(1)-Al(2) bond lengths are 2.69 Å. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to four equivalent Lu(1), four equivalent Lu(2), and two equivalent Al(1) atoms.