Nuclear magnetic resonance (NMR) results are presented for lithium in several powder samples with a composition near ${\mathrm{Al}}_6$${\mathrm{Li}}_3$Cu which suggest a strong relationship between the cubic R phase and the icosahedral phase. All NMR spectra show a broad component which arises from a site in R-phase samples as well as what appears to be a similar site in the icosahedral phase. The pure R phase and samples with an appreciable amount of R-phase material exhibit a second very narrow peak attributable to Li atoms undergoing rapid motion at a different and perhaps interstitial site.

• Received 12 January 1988

DOI:https://doi.org/10.1103/PhysRevB.37.9053