NDLI: NMR and Mössbauer Study of Al2O3

Content Provider	Springer Nature Link
Author	Nava, N. Salas, P. Llas, M. E. Pérez Pastenes, H. Viveros, T.
Copyright Year	2005
Abstract	Alumina–europia mixed oxides with 5 and 10 wt.% Eu2O3 were studied by Mössbauer spectroscopy, 27Al MAS-NMR and X-ray diffraction (XRD). The samples were prepared by the sol–gel technique. The XRD patterns for the calcined samples show a broad peak around 2θ = 30° which is assigned to the Eu2O3; after treatment with hydrogen at 1073 K no reduction to Eu+2 or Eu0 was observed. The NMR spectra show three peaks, which are assigned to the octahedral, pentahedral and tetrahedral aluminum sites; the intensity of each peak depends on the concentration of europium ions. The Mössbauer spectra of the calcined samples show a single peak near zero velocity which is attributed to the Eu+3; after H2 treatment at 1073 K similar spectra were obtained, suggesting Eu+3 is not reducibly at this temperature.
Starting Page	11
Ending Page	19
Page Count	9
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	161
Issue Number	1-4
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2005-12-02
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Mössbauer spectroscopy nuclear magnetic resonance X-ray diffraction Surfaces and Interfaces, Thin Films Condensed Matter Atoms, Molecules, Clusters and Plasmas Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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