Crystal structure of Hf6PtAl2 and comparison with HfPtAl

Crystal structure of Hf₆PtAl₂ and comparison with HfPtAl

Chem. Met. Alloys 1 (2008) 261-264

https://doi.org/10.30970/cma1.0059

The Hf₆PtAl₂ and HfPtAl compounds have been synthesized by arc-melting followed by heat treatment at 800°C for ten days. These intermetallics crystallize with hexagonal symmetry and have the lattice parameters a = 7.9054(3) Ǻ, c = 3.3438(1) Ǻ (space group P-62m) for Hf₆PtAl₂ and a = 7.09197(8) Ǻ, c = 7.1152(1) Ǻ (space group P-62c) for HfPtAl.

Nearest-neighbor environments in the structures of Hf₆PtAl₂ (a) and HfPtAl (b). Coordination polyhedra of the central atoms are indicated.

Keywords

Hafnium platinum aluminide / Crystal structure / X-ray powder diffraction