The technique of high resolution Brillouin spectroscopy has been used to determine accurately the hydrostatic pressure dependence of the elastic constants of ice Ih in the full pressure range of phase stability 0 2.8 kbar. The percentage changes in the adiabatic elastic constants c,,, cI2. cI3, cS3, c,, and bulk modulus, over the pressure range, are 3.0, 7.2, 8.4, 2.8, -1.5 and 5.6 percent per ...

The elastic constants of single crystals of dilute solutions of Al, Si, Zn, Ga and Ge in Gu have been determined by the ultrasonic pulse method. Alloying causes a decrease in all the fundamental constants, C^, (C-^-C]^)^ and (G11 2C^2)/3> the relative decrease in (Gi2~Gi2)/2 being the greatest. The changes in shear constants Cu, and (C,-,-C-,2)/2 have been interpreted in terms of the known elec...

a GeoForschungsZentrum Potsdam, Section 4.1, Telegrafenberg, 14473 Potsdam, Germany b Department of Geosciences, Princeton University, Princeton, NJ 08544-1003, USA c Department of Civil and Environmental Engineering, University of California, Berkeley, CA, 94720, USA d Department of Earth and Planetary Science, University of California, Berkeley, CA 94720-4767, USA e GeoForschungsZentrum Potsd...

present success was attained by making various technical developments, such as a liquid-solid hybrid system and indium bond between sample and buffer-rod. Analytical procedures were also developed both in required corrections for apparent travel times, and in formulation of pressure effect on elasticity. A distinct shear softening was found in MgAl2O4, and was predicted to occur in MgO beyond 3...