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Crystal field parameters and energy level structure of the MnO4 tetroxo anion in Li3PO4, Ca2PO4Cl and Sr5(PO4)3Cl crystals |
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| Authors: | MG Brik R Borromei |
| Institution: | a Institute of Physics, University of Tartu, Riia 142, Tartu 51014, Estonia b Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica e Chimica, Fisica, Università di Parma, Viale G. P. Usberti 17/a, 43100 Parma, Italy c Dipartimento Scientifico e Tecnologico, Università di Verona, Strada Le Grazie 15, 37134 Verona, Italy |
| Abstract: | A comparative study concerning the electronic structure of the Mn5+ ion in the Li3PO4, Ca2PO4Cl, Sr5(PO4)3Cl host lattices has been carried out in the framework of the exchange charge model. The crystal field parameters have been evaluated using the structural data as the only input information. The 10 K absorption spectra of the investigated compounds have been measured in order to verify the correspondence between experimental and calculated energy levels. A systematic trend of the crystal field splitting of the most intense transitions has been evidenced and discussed by considering the symmetry properties of the coordination polyhedra around Mn5+. |
| Keywords: | Optical materials Crystal fields Optical properties |
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