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; February 2002; v. 87; no. 2-3; p. 333-338
© 2002 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 ISI 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 ISI Web of Science (11)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Crichton, W. A.
Right arrow Articles by Ross, N. L.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Equation of state of dense hydrous magnesium silicate phase A, Mg7Si2O8(OH)6

Wilson A. Crichton* and Nancy L. Ross{dagger}

Department of Geological Sciences, University College London, London WC1E 6BT, U.K.

The isothermal equation of state (EoS) of phase A, Mg7Si2O8(OH)6, has been determined using high-pressure single-crystal X-ray diffraction. A third-order Birch-Murnaghan EoS fit to pressure-volume data collected from room pressure and temperature to 7.6 GPa results in V0 = 512.56(3) Å3, K0 = 97.5(4) GPa, and K' = 5.97(14). Compression of the hexagonal (P63) structure is anisotropic with the c axis, which is perpendicular to the distorted close-packed planes of anions, approximately 23% less compressible than the a axis: Ka = 90.1(5) GPa with Ka ' = 5.4(2) and Kc = 116.8(9) GPa with K'c = 7.5(3). The bulk modulus of phase A is intermediate between those of brucite (Br) and forsterite (Fo) and less than those of hydroxylclinohumite and hydroxylchondrodite, in a manner that is entirely consistent with its water content and density in relation to the Fo-Br series of minerals.




This article has been cited by other articles:


Home page
 American MineralogistHome page
C. Sanchez-Valle, S. V. Sinogeikin, J. R. Smyth, and J. D. Bass
Single-crystal elastic properties of dense hydrous magnesium silicate phase A
American Mineralogist, May 1, 2006; 91(5-6): 961 - 964.
[Abstract] [Full Text] [PDF]

Home page
 Reviews in Mineralogy and GeochemistryHome page
S. D. Jacobsen
Effect of Water on the Equation of State of Nominally Anhydrous Minerals
Reviews in Mineralogy and Geochemistry, January 1, 2006; 62(1): 321 - 342.
[Full Text] [PDF]

Home page
 Mineral MagHome page
W. A. Crichton and N. L. Ross
Equations of state of dense hydrous magnesium silicates: results from single-crystal X-ray diffraction
Mineralogical Magazine, June 1, 2005; 69(3): 273 - 287.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
C. B. Vanpeteghem, C. B. Vanpeteghem, E. Ohtani, T. Kondo, K. Takemura, and T. Kikegawa
Compressibility of phase Egg AlSiO3OH: Equation of state and role of water at high pressure
American Mineralogist, October 1, 2003; 88(10): 1408 - 1411.
[Abstract] [Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2008 by Mineralogical Society of America