1. bookVolume 62 (2017): Issue 2 (June 2017)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

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

Published Online: 09 Jun 2017
Volume & Issue: Volume 62 (2017) - Issue 2 (June 2017)
Page range: 141 - 144
Received: 30 Aug 2016
Accepted: 10 Dec 2016
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
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.

Keywords

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.1998.0205Search in Google Scholar

2. Warner, J. K., & Ewing, R. C. (1993). Crystal chemistry of samarskite. Am. Mineral., 78, 419-424.Search in Google Scholar

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

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/s10751-009-0105-7Search in Google Scholar

5. Hawthorne, F. C. (1988). Spectroscopic methods in mineralogy and geology. Rev. Mineral., 18, 255-340. DOI: 10.1017/S0016756800022962.10.1017/S0016756800022962Search in Google Scholar

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

Recommended articles from Trend MD

Plan your remote conference with Sciendo