- Tytuł:
- Preliminary results of 57Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon
- Autorzy:
-
Malczewski, D.
Grabias, A. - Powiązania:
- https://bibliotekanauki.pl/articles/146552.pdf
- Data publikacji:
- 2017
- Wydawca:
- Instytut Chemii i Techniki Jądrowej
- Tematy:
-
samarskite
metamict minerals
Mössbauer spectroscopy
recrystallization - Opis:
- The preliminary results of 57Fe Mössbauer spectroscopy and X-ray diffraction (XRD) of fully metamict samarskite dated at ~1500 Ma, which absorbed -dose of 6.5 × 1017 α-decay mg–1, are reported after one-hour annealing at 673, 873, 1173 and 1373 K in argon atmosphere. Metamict minerals contain radioactive elements that degrade their crystal structures over geological time. All the Mössbauer spectra obtained can be fitted to two quadrupole doublets assigned to Fe2+ and Fe3+ in octahedral positions. The relative contribution of Fe2+ (Fe2+/Fe) reaches a minimum of 0.10 at 1173 K.
- Źródło:
-
Nukleonika; 2017, 62, 2; 141-144
0029-5922
1508-5791 - Pojawia się w:
- Nukleonika
- Dostawca treści:
- Biblioteka Nauki
Artykuł