Mössbauer investigation of the europium state in fluoride glasses

Autor:	E. A. Tomil’tsev, S. A. Nemov, P. P. Seregin, N. O. Tagil’tseva
Rok vydání:	2006
Předmět:	inorganic chemicals Inorganic chemistry chemistry.chemical_element Nitride Condensed Matter Physics Ion Metal chemistry.chemical_compound chemistry Aluminium visual_art Mössbauer spectroscopy Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Spectroscopy Europium Fluoride
Zdroj:	Glass Physics and Chemistry. 32:257-259
ISSN:	1608-313X 1087-6596
Popis:	The structure of glasses based on fluorides of alkaline-earth metals, aluminum, and europium, in which aluminum fluoride is partially replaced by aluminum nitride, is investigated by 151Eu Mossbauer spectroscopy. It is found that these glasses contain europium atoms in two oxidation states (+2 and +3). The isomer shifts of the Mossbauer spectra of Eu3+ and Eu2+ ions entering into the composition of the fluoride glasses are somewhat different from the isomer shifts of the Mossbauer spectra of EuF3 and EuF2 compounds. This difference is explained by the effect of the alkaline-earth metal and aluminum atoms (not bound directly to the europium atoms) on the electron density at the 151Eu nuclei. The broadening of the Mossbauer spectra of the Eu2+ ions in the fluoride glasses is explained by the nonuniform isomer shift.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::217775096a6d0ae63c3219b1c4925c5e https://doi.org/10.1134/s1087659606020210 Zobrazit plný text záznamu Full text from SpringerLink