Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
American Mineralogist house ad
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
American Mineralogist; June 1998; v. 83; no. 5-6; p. 546-552
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Meissner, E.
Right arrow Articles by Chakraborty, S.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Quantitative measurement of short compositional profiles using analytical transmission electron microscopy

Elke Meissner, Thomas G. Sharp, and Sumit Chakraborty

Universitaet Bayreuth, Bayerisches Geoinstitut, Bayreuth, Federal Republic of Germany
Arizona State University, United States
Universitaet zu Koeln, Federal Republic of Germany

Analytical transmission electron microscopy (ATEM) was used to quantitatively measure sub-micrometer compositional profiles produced experimentally by Fe-Mg interdiffusion experiments in olivine. Although analysis of minerals by ATEM is common, compositional profiles suitable for quantitative modeling of diffusion are not generally measured in minerals with ATEM. To demonstrate the suitability of ATEM for diffusion studies in minerals, we have investigated Fe-Mg interdiffusion in experimentally annealed olivine. Because the compositional gradients were induced under well-controlled laboratory conditions, the accuracy of the measurements could be tested by comparing compositional profiles measured by both ATEM and EMPA as well as by retrieving diffusion coefficients from both TEM and EMPA data. The agreement in diffusion coefficients shows that point defect equilibration in the interfacial region of the diffusion couple occurs extremely rapidly at 1200 degrees C. The ability to obtain diffusion data from such short anneals enables various experiments that were not previously possible--for example, to study diffusion rates at high pressures where long f O2 buffered anneals are not generally feasible. ATEM profile measurement is compared with other techniques such as SIMS and RBS and some limitations and applications of ATEM profile measurements are also discussed.

This record provided courtesy of AGI/GeoRef.




This article has been cited by other articles:


Home page
 Eur J MineralHome page
D. P. Dobson, M. Alfredson, C. Holzapfel, and J. P. Brodholt
Grain-boundary enrichment of iron on magnesium silicate perovskite
European Journal of Mineralogy, October 1, 2007; 19(5): 617 - 622.
[Abstract] [Full Text] [PDF]

Home page
 Eur J MineralHome page
R. DOHMEN, H.-W. BECKER, E. MEIssNER, T. ETZEL, and S. CHAKRABORTY
Production of silicate thin films using pulsed laser deposition (PLD) and applications to studies in mineral kinetics
European Journal of Mineralogy, December 1, 2002; 14(6): 1155 - 1168.
[Abstract] [Full Text] [PDF]

Home page
 Reviews in Mineralogy and GeochemistryHome page
D. R. Cole, D. R. Cole, and S. Chakraborty
Rates and Mechanisms of Isotopic Exchange
Reviews in Mineralogy and Geochemistry, January 1, 2001; 43(1): 83 - 223.
[Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Mineralogical Society of America