<abstract xmlns="http://www.w3.org/1999/xhtml"> 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. </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.

Preliminary results of 57Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

Nukleonika

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Preliminary results of Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

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...

Preliminary results of ⁵⁷Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

Pubblicato online: 09 giu 2017

Pagine: 141 - 144

Ricevuto: 30 ago 2016

Accettato: 10 dic 2016

DOI: https://doi.org/10.1515/nuka-2017-0020

Parole chiave
samarskite, metamict minerals, Mössbauer spectroscopy, recrystallization

© by Dariusz Malczewski

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Preliminary results of 57Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

Pubblicato online: 09 giu 2017

Pagine: 141 - 144

Ricevuto: 30 ago 2016

Accettato: 10 dic 2016

DOI: https://doi.org/10.1515/nuka-2017-0020

Parole chiavesamarskite, metamict minerals, Mössbauer spectroscopy, recrystallization

© by Dariusz Malczewski

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Preliminary results of ⁵⁷Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

Parole chiave
samarskite, metamict minerals, Mössbauer spectroscopy, recrystallization