caa a22 4500 467923752 CHVBK 20180406152924.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1134/S1087659606020210 doi (NATIONALLICENCE)springer-10.1134/S1087659606020210 Mössbauer investigation of the europium state in fluoride glasses [Elektronische Daten] [S. Nemov, P. Seregin, E. Tomil'tsev, N. Tagil'tseva] 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 Mössbauer spectroscopy. It is found that these glasses contain europium atoms in two oxidation states (+2 and +3). The isomer shifts of the Mössbauer spectra of Eu3+ and Eu2+ ions entering into the composition of the fluoride glasses are somewhat different from the isomer shifts of the Mössbauer 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 Mössbauer spectra of the Eu2+ ions in the fluoride glasses is explained by the nonuniform isomer shift. Pleiades Publishing, Inc., 2006 Nemov S. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Seregin P. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Tomil'tsev E. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Tagil'tseva N. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 257-259 1087-6596 32:2<257 2006 32 10720 https://doi.org/10.1134/S1087659606020210 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1087659606020210 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nemov S. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Seregin P. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Tomil'tsev E. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Tagil'tseva N. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, 195251, St. Petersburg, Russia aut NATIONALLICENCE 773 0- Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 257-259 1087-6596 32:2<257 2006 32 10720 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer