gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1973.039.301.12 Elastic Anisotropy in Minerals Newnham R. E. Yoon Hyo Sub 1 Materials Research Laboratory, The Pennsylvania State University, University Park, Pa., 16802, U.S.A.

Present address: Laboratory for Crystallographic Research, Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181 U.S.A.

 3 1973 39 301 78 84 21 10 1971 Copyright © 1973, The Mineralogical Society 1973 Summary

Silicate minerals show several correlations between structure type and elastic constants. Stiffness coefficients are generally larger in the direction of Si-O bonding. A simple mechanical analogy in which atomic bonds are simulated by springs connected in series and parallel is used to estimate the size and anisotropy of the elastic moduli and their pressure derivatives.