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

Malczewski, Dariusz; Grabias, Agnieszka

doi:10.1515/nuka-2017-0020

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

Nukleonika

Volume 62 (2017): Issue 2 (June 2017)

By: Dariusz Malczewski and Agnieszka Grabias

Open Access

|Jun 2017

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.

References

1. Matzke, H., Motta, A. T., Nastas, M., Salje, E. K. H., Vance, E. R., & Zinkle, S. J. (1998). Radiation effects in crystalline ceramics for the immobilization of high-level nuclear waste and plutonium. J. Mater. Res., 13, 1434-1484. DOI: 10.1557/JMR.1998.0205.10.1557/JMR.1998.0205
Search in Google Scholar Back to article
2. Warner, J. K., & Ewing, R. C. (1993). Crystal chemistry of samarskite. Am. Mineral., 78, 419-424.
Search in Google Scholar Back to article
3. Bryant, B., McGrew, L. W., & Wobus, R. A. (1981). Geologic map of the Denver 1 x 2 degree quadrangle, north-central Colorado: U.S. Geological Survey Miscellaneous Investigations Map I-1163, scale 1: 250,000.
Search in Google Scholar Back to article
4. Malczewski, D., & Grabias, A. (2010). 57Fe Mössbauer spectroscopy of radiation damaged samarskites and gadolinites. Hyperfi ne Interact., 195, 85-91. DOI: 10.1007/s10751-009-0105-7.10.1007/s10751-009-0105-7
Search in Google Scholar Back to article
5. Hawthorne, F. C. (1988). Spectroscopic methods in mineralogy and geology. Rev. Mineral., 18, 255-340. DOI: 10.1017/S0016756800022962.10.1017/S0016756800022962
Search in Google Scholar Back to article
6. Stevens, J. G., Khasanov, A. M., Miller, J. W., Pollak, H., & Li, Z. (2005). Mössbauer mineral handbook. Asheville, NC, USA: Mossbauer Effect Data Center, The University of North Carolina. Available from https://www.mtholyoke.edu/courses/mdyar/data/MineralHandbook.pdf.
Search in Google Scholar Back to article

DOI: https://doi.org/10.1515/nuka-2017-0020 | Journal eISSN: 1508-5791 | Journal ISSN: 0029-5922

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Language: English

Page range: 141 - 144

Submitted on: Aug 30, 2016

Accepted on: Dec 10, 2016

Published on: Jun 9, 2017

Published by: Institute of Nuclear Chemistry and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

samarskite,

metamict minerals,

Mössbauer spectroscopy,

recrystallization

Related subjects:

Chemistry,

Nuclear chemistry,

Physics,

Astronomy and astrophysics,

Physics, other

© 2017 Dariusz Malczewski, Agnieszka Grabias, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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