Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
American Mineralogist RIMG advertisement
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
American Mineralogist; April 1998; v. 83; no. 3-4; p. 300-304
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 Cabaret, D.
Right arrow Articles by Flank, A.-M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Full multiple scattering calculations of the X-ray absorption near edge structure at the magnesium K-edge in pyroxene

Delphine Cabaret, Philippe Sainctavit, Philippe Ildefonse, and Anne-Marie Flank

Universite Paris VI et VII Laboratoire de Mineralogie-Cristallographie, Paris, France

We present a comparison between XANES experiments and full multiple-scattering calculations at the magnesium K-edge for two pyroxenes, diopside and enstatite, for which Mg atoms are only in the M1 site and in two distinct sites M1 and M2, respectively. The influence of the number of octahedral sites per unit cell and of the site distortion on Mg K-edge XANES spectra is investigated. Good agreement between experiment and calculations is obtained. Full multiple-scattering calculations permit identification of the contribution of each site. Comparison reveals that the Mg K-edge spectra of enstatite and diopside M1 sites have the same XANES profile. Cluster size analysis shows that most Mg K-edge XANES features are related to medium range order, i.e., 6 Aa around the absorbing atom. We therefore clearly define the Mg K-edge signature of the geometrical arrangement of atoms around each site, M1 and M2.

This record provided courtesy of AGI/GeoRef.




This article has been cited by other articles:


Home page
 Mineral MagHome page
A. A. Finch and N. Allison
Coordination of Sr and Mg in calcite and aragonite
Mineralogical Magazine, October 1, 2007; 71(5): 539 - 552.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
H. Sitepu, M. G. Kopylova, D. H. Quirt, J. N. Cutler, and T. G. Kotzer
Synchrotron micro-X-ray fluorescence analysis of natural diamonds: First steps in identification of mineral inclusions in situ
American Mineralogist, November 1, 2005; 90(11-12): 1740 - 1747.
[Abstract] [Full Text] [PDF]

Home page
 Reviews in Mineralogy and GeochemistryHome page
G. E. Brown Jr. and N. C. Sturchio
An Overview of Synchrotron Radiation Applications to Low Temperature Geochemistry and Environmental Science
Reviews in Mineralogy and Geochemistry, January 1, 2002; 49(1): 1 - 115.
[Full Text] [PDF]

Home page
 American MineralogistHome page
S. Kroeker and J. F. Stebbins
Magnesium coordination environments in glasses and minerals: New insight from high-field magnesium-25 MAS NMR
American Mineralogist, October 1, 2000; 85(10): 1459 - 1464.
[Abstract] [Full Text] [PDF]


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