Elasticity of Coesite

  1. Thomas J. Shankland and
  2. Jay D. Bass
  1. Donald J. Weidner1 and
  2. Herbert R. Carleton2

Published Online: 21 MAR 2013

DOI: 10.1029/SP026p0414

Elastic Properties and Equations of State

Elastic Properties and Equations of State

How to Cite

Weidner, D. J. and Carleton, H. R. (1988) Elasticity of Coesite, in Elastic Properties and Equations of State (eds T. J. Shankland and J. D. Bass), American Geophysical Union, Washington, D. C.. doi: 10.1029/SP026p0414

Author Information

  1. 1

    Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794

  2. 2

    Department of Materials Science, State University of New York, Stony Brook, New York 11794

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780875902401

Online ISBN: 9781118664971

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Keywords:

  • Brillouin scattering measurements;
  • Coesite;
  • Elastic constant models;
  • Photon-counting electronics;
  • Rock-forming minerals;
  • Shear/quasi-shear measurements;
  • Ultra sonic techniques

Summary

The single-crystal elastic constants of SiO2, coesite (monoclinic, C2/c) , have been determined from Brillouin scattering measurements on a 100-μm crystal. The elastic constants inferred from acoustic velocities for 80 different propagation directions are (in units of Mbar) Cll = 1.608, c22 = 2.304, c33 = 2.316, c44 = 0.678, c55 = 0.733, c66 = 0.588, c12 = 0.821, c13 = 1.029, c15 = −0.362, c23 = 0.356, c25 = 0.026, c35 = −0.393, and c46 = 0.099. This experimental technique provides a method of determining single-crystal elastic properties for materials such as high-pressure phases that are not available in sufficiently large sizes for ultrasonic measurements.