Application of lanthanide (Eu, Nd) spectroscopy as a structural probe of diluted double phosphates

• Published in: Journal of alloys and compounds Vol. 341; no. 1-2; pp. 297 - 306
• Main Authors: Szuszkiewicz, W, Keller, B, Guzik, M, Aitasalo, T, Niittykoski, J, Hölsä, J, Legendziewicz, J
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 17.07.2002; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron-phonon coupling; Exact sciences and technology; Excitation spectra; Intensities of f-f transitions; Ln=Eu, Nd; Luminescence; M3Ln(PO4)2 (M=Na, Rb; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Photoluminescence; Physics; Spectroscopy; Spectroscopy; M3Ln(PO4)2 (M=Na, Rb; Ln=Eu, Nd; Electron-phonon coupling; Intensities of f-f transitions; Luminescence; Excitation spectra; Integrated intensity; Phosphates; Raman spectra; Europium compounds; Neodymium compounds; Photoluminescence; Electron-phonon interactions; Rubidium compounds; Infrared spectra; Rare earth compounds; Experimental study; Energy-level transitions; Crystallographic site; Excitation spectrum; Absorption spectra; Quaternary compounds; Sodium compounds
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(02)00028-2

The present studies are focused on the application of europium(III) emission as a structural probe of diluted double phosphate and the determination of the number of metal sites, as well as their symmetries. The influence of the M(I) ions on the structure of phosphates is shown in the emission spectra at 77 K. The IR and Raman spectra were measured and used in the assignment of the vibronic components of electronic transitions. The electron–phonon coupling was analyzed in the emission and excitation spectra of europium double phosphate. Moreover, absorption spectra at 293 and 4 K as well as intensity analysis of Nd(III) f–f transition were used in the detection of structural modifications in both types of phosphates—rubidium (1) and sodium (2) salts. The energy level diagram was proposed and compared to the earlier reported data for different types of phosphates.