Abstract
AbstractLiNbO3 crystals grown from Na2O, Rb2O, and Cs2O containing fluxes were characterized by infrared and Raman spectroscopic methods. Pure, nearly stoichiometric crystals with 49.7–50.0 mol% Li2O content were obtained from solvents containing Rb2O and Cs2O, while Na2O entered the crystal as a dopant. The intensity ratio of two OH– absorption peaks at 3480 and 3465 cm–1 in thermal equilibrium was shown to be a useful and accurate parameter for the determination of the lithium content of pure LiNbO3 crystals close to the stoichiometric composition. From the remarkable change of both infrared and Raman spectra in crystals grown from Na2O solvent, the incorporation of Na on Li sites was assumed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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