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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on HfAlPt by Materials Project

HfPtAl crystallizes in the hexagonal P-62c space group. The structure is three-dimensional. Hf is bonded in a 5-coordinate geometry to five Pt and six equivalent Al atoms. There are a spread of Hf–Pt bond distances ranging from 2.79–2.88 Å. There are a spread of Hf–Al bond distances ranging from 3.01–3.18 Å. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 9-coordinate geometry to three equivalent Hf and six equivalent Al atoms. All Pt–Al bond lengths are 2.58 Å. In the second Pt site, Pt is bonded in a 9-coordinate geometry to six equivalent Hf and three equivalent Al atoms. All Pt–Al bond lengths are 2.67 Å. Al is bonded in a 4-coordinate geometry to six equivalent Hf and four Pt atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfAlPt by Materials Project

HfPtAl crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Hf is bonded in a 5-coordinate geometry to five Pt and six equivalent Al atoms. There are one shorter (2.84 Å) and four longer (2.85 Å) Hf–Pt bond lengths. There are two shorter (3.01 Å) and four longer (3.16 Å) Hf–Al bond lengths. There are two inequivalent Pt sites. In the first Pt site, Pt is bonded in a 9-coordinate geometry to three equivalent Hf and six equivalent Al atoms. All Pt–Al bond lengths are 2.61 Å. In the second Pt site, Pt is bonded in a 9-coordinate geometry to six equivalent Hf and three equivalent Al atoms. All Pt–Al bond lengths are 2.61 Å. Al is bonded in a 4-coordinate geometry to six equivalent Hf and four Pt atoms.

36 MATERIALS SCIENCE↗