Abstract
This research reports a study of vibrational Raman spectroscopy and a result of lattice dynamic calculation in the monoclinic phase of a polycrystalline manganese molybdate (MnMoO4) sample at ambient conditions. The lattice dynamics calculation was applied to investigate the predicted vibrational normal Raman modes. This computational calculation was made based on a rigid ion model and the results show a good agreement with the experimental data. Furthermore, a pressure-dependent Raman study was carried out in order to obtain information about the spectroscopy properties, structural stability and evolution of phase transformations of MnMoO4. Additionally, to infer the phase transformations that occurred in this material, the principal components analysis (PCA) and hierarchical cluster analysis (HCA) were performed.
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