Vibration and Luminescence Spectroscopic Investigations of the Alkali Rare Earth Double Phosphates M3(RE,Eu)(PO4)2 (M=K, Rb; RE=La, Gd)
M. Kloss, L. Schwarz
Ernst-Moritz-Arndt-University of Greifswald, Institute of Chemistry and Biochemistry, D-17487 Greifswald, Germany
and J.P.K. Hölsä
University of Turku, Department of Chemistry, FIN-20014 Turku, Finland
Received: August 22, 1998; in final form January 12, 1999

Dedicated to Prof. Dr. Detlef Haberland on his 60th birthday

Full Text PDF
The room temperature IR- and Raman spectra of the different M3RE(PO4)2 (M = K, Rb; RE = La, Eu, Gd) double phosphates were analysed and used to interpret the vibronic side band structure in the photoluminescence spectra. The intraconfigurational 4f-4f electronic transitions in the photoluminescence spectra of the Eu3+ doped M3RE(PO4)2 were analysed in detail. The crystal field fine structure of the 5D07FJ (J=0-4) transitions was analysed accounting for the information on the crystal structure. The effect of the temperature as well as the alkali host cation was evaluated. Finally, a preliminary crystal field energy level scheme for the 7FJ (J=0-4) ground term was deduced from the analysis of the photo-luminescence as well as IR- and Raman spectra.
DOI: 10.12693/APhysPolA.95.343
PACS numbers: 61.50.-f, 61.66.Fn, 63.20.-e, 71.20.Dg, 71.20.Eh, 71.70.-d, 78.30.-j, 78.55.-m