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- W1989191696 abstract "Abstract The diffusion of 7 Li in the intermetallic compound, LiAl, has been studied by quasielastic incoherent neutron scattering. The measurements were performed on a single crystal sample of composition, 49% 7 Li and 51% 27 Al. Since the incoherent scattering cross section of 7 Li is small, σ inc = .7 barns, only a limited number of measurements were performed as a function of momentum transfer and temperature. These measurements present the first direct determination of the tracer diffusion, D ∗ , of Li in LiAl. The value of D ∗ Li was determined to be (6±1) × 10 −6 cm 2 /sec at 800 K. This value is in reasonable agreement with the value extrapolated from low temperature NMR measurements as well as with results derived from chemical diffusivity data. The Li diffusion is a result of a very rapid diffusion of constitutional vacancies residing primarily on the Li sublattice. Approximately 5% of the sites on the Li sublattice are vacant in the present sample, Li .49 Al .51 ." @default.
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- W1989191696 date "1981-10-01" @default.
- W1989191696 modified "2023-09-23" @default.
- W1989191696 title "Quasielastic neutron scattering studies of 7 Li diffusion in the mixed conductor, LiAl" @default.
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- W1989191696 doi "https://doi.org/10.1016/0167-2738(81)90282-4" @default.
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