Abstract
The crystal growth, structure and Raman spectra of the PrxY1−xAl3(BO3)4 (PYAB) single crystals are introduced. The experiments show that the characteristic lattice vibrational spectrum of the PYAB arises mainly from the internal vibrations of the BO3 and AlO6 groups, and that the rigidity of the lattice is mainly ascribed to the vibrations of B—O and Al—O bonds. For the Pr/YO6 groups, there is no O2− ion that is independent of the BO3 and AlO6 groups, and no new internal vibrational mode arises. Hence the characteristic lattice vibrational spectrum is not affected by the rare earth ions doped in the PYAB, and the ions can affect the external vibrations of the BO3 and AlO6 groups and improve the structural and optical quality of the crystals. Copyright © 1999 John Wiley & Sons, Ltd.
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