Light-scattering investigations in the temperature range from 10 to 850K have been performed on single crystals of silver niobate AgNbO 3 . The results are compared with structural and dielectric measurements revealing a complex sequence of phases. The Raman results and especially the strong central peak, which occurs over a wide range of frequencies and temperatures, are analysed in connection with the various phase transformations. The specific contributions of the niobium and the silver ions are tentatively discussed.
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Kania et al. (1986) studied this question.
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