Abstract
The fundamental vibrations of the (PO3) −4 anions in the AgGd(PO3)4 crystal are predicted by employing the correlation method based on the group theory. Nine external vibrations are allowed with no coincidence activity between infrared and Raman spectra. The free PO3 ion with C 3v molecular symmetry has six normal vibrations. Due to the crystal-field splitting effect, the six normal modes of vibrations are split into 96 intramolecular vibrations. Symmetric and asymmetric stretching and bending modes are identified with determining of their spectral activity.
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Abd-Elrahman, M.I. Crystal-field splitting effect on the vibrations of polytetraphosphate anion in the AgGd(PO3)4 crystal. Opt. Spectrosc. 114, 91–95 (2013). https://doi.org/10.1134/S0030400X13010025
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DOI: https://doi.org/10.1134/S0030400X13010025