TmAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. In the second Tm site, Tm(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(1) is bonded to four equivalent Tm(1), four equivalent Tm(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlTm8Al4 cuboctahedra. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to four equivalent Tm(1), four equivalent Tm(2), and two equivalent Al(1) atoms.
TmAl crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 8-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two shorter (3.25 Å) and two longer (3.34 Å) Tm(1)-Al(1) bond lengths. There are a spread of Tm(1)-Al(2) bond distances ranging from 3.01-3.22 Å. In the second Tm site, Tm(2) is bonded in a 6-coordinate geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two shorter (3.16 Å) and two longer (3.48 Å) Tm(2)-Al(1) bond lengths. There are a spread of Tm(2)-Al(2) bond distances ranging from 3.00-3.25 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Tm(1), four equivalent Tm(2), two equivalent Al(1), and two equivalent Al(2) atoms to form a mixture of distorted edge, face, and corner-sharing AlTm8Al4 cuboctahedra. Both Al(1)-Al(1) bond lengths are 2.77 Å. Both Al(1)-Al(2) bond lengths are 2.70 Å. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to four equivalent Tm(1), four equivalent Tm(2), and two equivalent Al(1) atoms.