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Polarized Raman, IR, optical and dielectric studies of RbNd(WO 4 ) 2 single crystal have been performed. Symmetries of the observed Raman and IR modes have been established and their assignment to respective motions of atoms has been proposed. We have shown that the phonon properties of RbNd(WO 4 ) 2 are very similar to the phonon properties of KGd(WO 4 ) ...
Electronic absorption spectra of 2-methylamino-, 2-ethylamino-3-methyl-4-nitropyridine and 2-ethylamino-, 2-methylamino-5-methyl-4-nitropyridine in the solid state and ethyl alcohol solution have been measured at room temperature. Their luminescence spectra and life times have been recorded at room and liquid helium temperatures. The energy sequence of the singlet and triplet states has been calculated...
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