Anisotropic Relaxation Peak in the Internal Friction of Crystalline Quartz

Wasilik, John H.

doi:10.1103/physrev.105.1174

Cited by 7 publications

(2 citation statements)

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“…Complex motions involving the simultaneous movement of groups of atoms might have the long relaxation times required. The (1) Wasilik [1957];…”

Section: Relaxations In Systems Undergoing Phase Transformationsmentioning

confidence: 99%

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Physical mechanisms of seismic wave attenuation

Karato

2008

Deformation of Earth Materials

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The theoretical and experimental evidence concerning mechanisms likely to be responsible for the attenuation of seismic waves are reviewed. Intergranular thermoelastic relaxation, atomic diffusion, and dislocation mechanisms cannot be ruled out as significant causes of seismic attenuation, but the most effective mechanisms seem to be associated with partial melting, grain-boundary relaxation, and a poorly understood mechanism called 'high-temperature, internal-friction background' which obeys an equation of the form Q4= (A/f) exp (--H*/RT) Here Q-X is a dimensionless measure of artelasticity, ] is the frequency, T is the absolute temperature, and A, H*, and R are constants for a material of uniform composition and grain size. Many of the mechanisms considered here have a strongl• frequency-dependent Q-x. However, in a material as complex as a rock, there is unlikely to be a single discrete relaxation time or activation energy, or a single 'typical' grain size. The obx Contribution 1570, Division of Geological: Sciences, California Institute of Technology, Pasadena.

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“…Complex motions involving the simultaneous movement of groups of atoms might have the long relaxation times required. The (1) Wasilik [1957];…”

Section: Relaxations In Systems Undergoing Phase Transformationsmentioning

confidence: 99%

“…High-temperature relaxation peaks in single crystals. Data from:(1)Wasilik [1957]; (2)Marx and Sivertsen [1953]; (3)Southgate [1966];(4)Ghang [1961]; (5)Turnbaugh [1962].…”

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confidence: 99%