Icosahedral ordering in Ti-Hf-Ni alloys?

The local atomic structure of crystalline and amorphous Ti-Hf-Ni alloys has been probed by EXAFS. The local order is similar in the crystalline Ti-Hf-Ni alloy and in Ti-Zr-Ni crystalline and quasicrystalline phases, where icosahedral ordering exists around some nickel sites. The local atomic structure is different in the amorphous Ti-Hf-Ni alloys, in particular around the nickel atoms, where a new icosahedral atomic configuration that is similar to that in the Ti₂Ni crystal phase is identified.