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; November 2006; v. 91; no. 11-12; p. 1893-1900; DOI: 10.2138/am.2006.2215
© 2006 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 (6)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Jiang, F.
Right arrow Articles by Duffy, T. S.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Single-crystal elasticity of brucite, Mg(OH)2, to 15 GPa by Brillouin scattering

Fuming Jiang*, Sergio Speziale{dagger} and Thomas S. Duffy

Department of Geosciences, Princeton University, Princeton, New Jersey 08544, U.S.A.

Correspondence: * E-mail: fumingj{at}princeton.edu

The second-order elastic constants of brucite were determined by Brillouin scattering to 15 GPa in a diamond anvil cell. The experiments were carried out using a 4:1 methanol-ethanol mixture as pressure medium, and ruby as a pressure standard. Two planes, one perpendicular to the c axis (basal plane) and the other containing the c axis (meridian plane), were measured at room pressure and 10 elevated pressures. Individual elastic stiffnesses, aggregate moduli, and their pressure derivatives were obtained by fitting the data to Eulerian finite strain equations. The inversion yields individual elastic constants of C11 = 154.0(14) GPa, C33 = 49.7(7) GPa, C12 = 42.1(17) GPa, C13 = 7.8(25) GPa, C14 = 1.3(10) GPa, C44 = 21.3(4) GPa, and their pressure derivatives of ({delta} C11/{delta} P)0 = 9.0(2), ({delta} C33/{delta} P)0 = 14.0(5), ({delta} C12/{delta} P)0 = 3.2(2), ({delta} C13/{delta} P)0 = 5.0(1), ({delta} C14/{delta} P)0 = 0.9(1), ({delta} C44/{delta} P)0 = 3.9(1). Aggregate moduli and their pressure derivatives are KS0 = 36.4(9) GPa, G0 = 31.3(2) GPa, ({delta} KS/{delta} P)T0 = 8.9(4), ({delta} G/{delta} P)0 = 4.3(1) for the Reuss bound, and KS0 = 43.8(8) GPa, G0 = 35.2(3) GPa, ({delta} KS/{delta} P)T0 = 6.8(2), ({delta} G/P)0 = 3.4(1) for the Voigt-Reuss-Hill average. The ratio of the linear compressibility along the c and a axes decreased from 4.7 to 1.3 over the examined pressure range. The shear anisotropy (C66/C44) decreased from 2.6(1) at ambient condition to 1.3(1) with increase of pressure to 12 GPa. Axial compressibilities and a compression curve constructed from our Brillouin data are in good agreement with previous X-ray diffraction data. The increased interlayer interactions and hydrogen repulsion that occurs as brucite is compressed produce a continuous variation of elastic properties rather than any abrupt discontinuities.

Key Words: Brucite • elasticity • high pressure • brillouin scattering




This article has been cited by other articles:


Home page
 American MineralogistHome page
P. D. Mitev, G. Gajewski, and K. Hermansson
Anharmonic OH vibrations in brucite: Small pressure-induced redshift in the range 0-22 GPa
American Mineralogist, November 1, 2009; 94(11-12): 1687 - 1697.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
P. Comodi, S. Nazzareni, P. F. Zanazzi, and S. Speziale
High-pressure behavior of gypsum: A single-crystal X-ray study
American Mineralogist, October 1, 2008; 93(10): 1530 - 1537.
[Abstract] [Full Text] [PDF]


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