Abstract
We report and spin-echo spectra for the icosahedral quasicrystals and and for the amorphous and equilibrium crystalline forms of . The distribution of local electric-field-gradient magnitudes at the Al sites in icosahedral is only slightly narrower than in the amorphous form, but the local asymmetry in the former is significantly restricted to lower values. A corresponding degree of order is not detectable for the Mn sites in icosahedral for which the distribution of the local environments is comparable with that observed in amorphous material. Broad distributions are also inferred for both Al and Mn sites in icosahedral .
- Received 16 August 1985
DOI:https://doi.org/10.1103/PhysRevB.32.7614
©1985 American Physical Society