Vibrational spectra and internal phonon calculations for the M2Cu2O5 binary oxides (M = In,Sc, Y or from Tb to Lu) |
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| Affiliation: | 1. Département de Physique, Groupe de Physique des Matériaux Luminescents, Université de Sfax, Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, BP 1171, Université de Sfax, 3018, SFAX, Tunisia;2. Departament de Química Física i Inorgànica, Física i Cristal•Lografia de Materials i Nanomaterials (FiCMA-FiCNA), Universitat Rovira i Virgili, Marcel•li Domingo 1, Tarragona 43007, Spain |
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| Abstract: | The room-temperature infrared and Raman scattering spectra of a large group of compounds with the general formula M2Cu2O5 were examined in the polycrystalline state (M is either Sc, In and Y or a heavy rare-earth element from Tb to Lu). The identification of the bands observed for the respective vibrational modes was proposed on the basis of the factor group approach and normal coordinate analysis. The Urey-Bradley force field model and potential energy distribution were applied in the phonon calculations. |
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