HfPtAl crystallizes in the hexagonal P-62m space group. Hf(1) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(2) is bonded in a 9-coordinate geometry to three equivalent Hf(1) and six equivalent Al(1) atoms. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Hf(1) and three equivalent Al(1) atoms. Al(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms.
HfPtAl crystallizes in the hexagonal P-62m space group. Hf(1) is bonded in a 5-coordinate geometry to one Pt(2) and four equivalent Pt(1) atoms. The Hf(1)-Pt(2) bond length is 2.81 Å. All Hf(1)-Pt(1) bond lengths are 2.83 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(2) is bonded in a 9-coordinate geometry to three equivalent Hf(1) and six equivalent Al(1) atoms. All Pt(2)-Al(1) bond lengths are 2.59 Å. In the second Pt site, Pt(1) is bonded in a 9-coordinate geometry to six equivalent Hf(1) and three equivalent Al(1) atoms. All Pt(1)-Al(1) bond lengths are 2.58 Å. Al(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pt(2) atoms.