TmCuAl crystallizes in the hexagonal P-62m space group. Tm(1) is bonded in a 11-coordinate geometry to one Cu(1), four equivalent Cu(2), and six equivalent Al(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1) and six equivalent Al(1) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Tm(1) and three equivalent Al(1) atoms. Al(1) is bonded in a 12-coordinate geometry to six equivalent Tm(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Al(1) atoms.
TmCuAl crystallizes in the hexagonal P-62m space group. Tm(1) is bonded in a 11-coordinate geometry to one Cu(1), four equivalent Cu(2), and six equivalent Al(1) atoms. The Tm(1)-Cu(1) bond length is 2.86 Å. All Tm(1)-Cu(2) bond lengths are 2.87 Å. There are two shorter (3.13 Å) and four longer (3.18 Å) Tm(1)-Al(1) bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Tm(1) and six equivalent Al(1) atoms. All Cu(1)-Al(1) bond lengths are 2.56 Å. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to six equivalent Tm(1) and three equivalent Al(1) atoms. All Cu(2)-Al(1) bond lengths are 2.70 Å. Al(1) is bonded in a 12-coordinate geometry to six equivalent Tm(1), two equivalent Cu(1), two equivalent Cu(2), and two equivalent Al(1) atoms. Both Al(1)-Al(1) bond lengths are 2.81 Å.