Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
American Mineralogist Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
American Mineralogist; March 1999; v. 84; no. 3; p. 226-232
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 Saxena, S. K.
Right arrow Articles by Le Bihan, T.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Equation of state of MgSiO 3 with the perovskite structure based on experimental measurement

Surendra K. Saxena, Leonid S. Dubrovinsky, Faramarz Tutti, and Tristan Le Bihan

Uppsala University, Department of Earth Sciences, Uppsala, Sweden

We studied MgSiO 3 with the perovskite structure heated to temperatures up to 1500 K at pressures between 36 and 110 GPa with in-situ X-ray diffraction. The new pressure-volume-temperature (P-V-T) data were combined with literature data to provide thermal expansivity alpha and compressibility beta against T (in K): alpha T = 2.71 X 10 (super -5) +1.80 X 10 9 T-1.48 T 2 (Model 1) or alpha T = 2.13 X 10 (super -5) +7.57 X 10 (super -9) T-1.02 T 2 (Model 2), and alpha T = 3.735 X 10 (super -7) +3.27 X 10 (super -11) T+6.60 X 10 (super -15) T 2 . Model 1 yields physical properties of perovskite that confirm Anderson's (1998) Debye approach; the model is valid for extrapolation to 3000 K or more. The parameters at 300 K are: alpha = 1.1 X 10 (super -5) , K 0 (bulk modulus) = 261 GPA, K' 0 = 4 and (theta K/theta T) = -0.027. Thermal expansivity from this model does not fit the data of Funamori et al. (1996) at high temperature for P = 25 GPa. Model 2 uses an equation for alpha based on the data of Funamori et al. (1996), fits the available experimental data closely, and maintains conformity with Anderson's Debye approach. Heat capacity, C p , data for perovskite is given by either: C p = 110.8+8.031 X 10 (super -3) T-1.302 X 10 (super -7) T 2 -1.647 X 10 7 T 2 +2.755 X 10 9 T (super -3) +267.5 T (super -0.5) +9287 T (super -1) (Model 1) or C p = 121.33+2.77 X 10 (super -3) T-2.585 X 10 (super -6) T 2 -1.710 X 10 7 T+2.792 X 10 9 T (super -3) -169 T (super -0.5) +15782 T (super -1) (Model 2).

This record provided courtesy of AGI/GeoRef.




This article has been cited by other articles:


Home page
 American MineralogistHome page
W. Liu, J. Kung, L. Wang, and B. Li
Thermal equation of state of CaGeO3 perovskite
American Mineralogist, May 1, 2008; 93(5-6): 745 - 750.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
S.-H. Shim and T. S. Duffy
Constraints on the P-V-T equation of state of MgSiO3 perovskite
American Mineralogist, February 1, 2000; 85(2): 354 - 363.
[Abstract] [Full Text] [PDF]

Home page
 ScienceHome page
B. B. Karki, R. M. Wentzcovitch, S. de Gironcoli, and S. Baroni
First-Principles Determination of Elastic Anisotropy and Wave Velocities of MgO at Lower Mantle Conditions
Science, November 26, 1999; 286(5445): 1705 - 1707.
[Abstract] [Full Text]


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