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

• Autorzy: Malczewski D. , Grabias A.

Identyfikatory

DOI

10.1515/nuka-2017-0020

• Konferencja: All-Polish Seminar on Mössbauer Spectroscopy OSSM 2016 (11th ; 19-22 June 2016 ; Radom-Turno, Poland)
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

samarskite; metamict minerals; Mössbauer spectroscopy; recrystallization

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2017
• Tom: Vol. 62, No. 2
• Strony: 141--144
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Malczewski D.

• Faculty of Earth Sciences, University of Silesia, 60 Będzińska Str., 41-200 Sosnowiec, Poland

autor

Grabias A.

• Institute of Electronic Materials Technology, 133 Wolczyńska Str., 01-919 Warsaw, Poland

Bibliografia

• 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.
• 2. Warner, J. K., & Ewing, R. C. (1993). Crystal chemistry of samarskite. Am. Mineral., 78, 419–424.
• 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.
• 4. Malczewski, D., & Grabias, A. (2010). 57Fe Mössbauer spectroscopy of radiation damaged samarskites and gadolinites. Hyperfine Interact., 195, 85–91. DOI: 10.1007/s10751-009-0105-7.
• 5. Hawthorne, F. C. (1988). Spectroscopic methods in mineralogy and geology. Rev. Mineral., 18, 255–340. DOI: 10.1017/S0016756800022962.
• 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.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).