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Bismuth niobate (Bi 3 NbO 7 ) exists under two crystallographic modifications, a tetragonal (type-III) phase between 800 and 900°C, and a pseudocubic (type-II) phase above and below this thermal range. The quenching at room temperature of pseudocubic type-II phase made it possible to carry out a detailed study of the transformation kinetics of this metastable type-II phase to the stable...
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