SmAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. In the second Sm site, Sm(2) is bonded in a 6-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(2) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Sm(2), and two equivalent Al(1) atoms. In the second Al site, Al(1) is bonded to four equivalent Sm(1), four equivalent Sm(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlSm8Al4 cuboctahedra.
SmAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. All Sm(1)-Al(1) bond lengths are 3.41 Å. There are a spread of Sm(1)-Al(2) bond distances ranging from 3.11-3.28 Å. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two shorter (3.30 Å) and two longer (3.54 Å) Sm(2)-Al(1) bond lengths. There are a spread of Sm(2)-Al(2) bond distances ranging from 3.12-3.32 Å. There are two inequivalent Al sites. In the first Al site, Al(2) is bonded in a 10-coordinate geometry to four equivalent Sm(1), four equivalent Sm(2), and two equivalent Al(1) atoms. Both Al(2)-Al(1) bond lengths are 2.73 Å. In the second Al site, Al(1) is bonded to four equivalent Sm(1), four equivalent Sm(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlSm8Al4 cuboctahedra. Both Al(1)-Al(1) bond lengths are 2.85 Å.