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Title: Preliminary results of 57Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon
Authors: Malczewski, Dariusz
Grabias, Agnieszka
Keywords: Metamict minerals; Mössbauer spectroscopy; Recrystallization; Samarskite
Issue Date: 2017
Citation: Nukleonika, Vol. 62, iss. 2 (2017), s. 141-144
Abstract: The preliminary results of 57Fe Mössbauer spectroscopy and X-ray diffraction (XRD) of fully metamict samarskite dated at ~1500 Ma, which absorbed α-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.
Description: This work was supported by National Science Centre, Poland, through grant no. PW-0415-003.
DOI: 10.1515/nuka-2017-0020
ISSN: 0029-5922
Appears in Collections:Artykuły (WNP)

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