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; October 2005; v. 90; no. 10; p. 1636-1640; DOI: 10.2138/am.2005.1747
© 2005 Mineralogical Society of America
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
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 Web of Science (5)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Prasad, P.S.R.
Right arrow Articles by Murthy, S. R.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Dehydration of natural stilbite: An in situ FTIR study

P.S.R. Prasad1,*, K. Shiva Prasad1,2 and S. Ramana Murthy2

1 National Geophysical Research Institute, Hyderabad, 500 007, India
2 Department of Physics, Osmania University, Hyderabad, 500 007, India

Correspondence: * E-mail: psrprasad{at}ngri.res.in

The dehydration behavior of a natural stilbite sample from Poona (India) was investigated by in situ FTIR. The thermal induced variations of the water molecule bending ({nu}2) mode around 1653 cm–1, the stretching ({nu}3 and {nu}1) modes around 3587 and 3426 cm–1, and the corresponding second-order modes in the wavenumber region 4000–8000 cm–1 were followed as indicative of the dehydration process. The observed spectral variations indicate that stilbite undergoes a transformation at about 448 K due to the loss of half of the original content of water molecules. The rehydration of stilbite is partial in samples heated up to 630 K. Concerning both the dehydration and rehydration behaviors of stilbite, our results are in concert with those proposed in the literature. In addition, the growth of a new mode around 4550 cm–1 is observed in the temperature range 430–650 K and may indicate the presence of hydroxyl groups created by the breaking of the T-O-T linkages.




This article has been cited by other articles:


Home page
 Eur J MineralHome page
P. S.R. PRASAD, K. S. PRASAD, B. SREEDHAR, and S. R. MURTHY
In-situ FTIR study of dehydration and rehydration mechanisms of natural scolecite
European Journal of Mineralogy, April 1, 2006; 18(2): 265 - 272.
[Abstract] [Full Text] [PDF]


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