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Room temperature 7Li spectra are reported for β-alumina samples with varying amounts of lithium substituted for sodium. A large dependence of the 7Li satellite (±3/2↔±1/2) position on lithium content was observed. A 91 percent-exchanged sample exhibited a thermally averaged lithium electric-field gradient of near-axial symmetry (η=0±0.04) with e2qQ=17.0±0.2 kHz. Field-dependent structure in the 1/2↔−1/2 transition was also observed.
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Highe et al. (1978) studied this question.
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