Finite amplitude internal friction experiments in α-quartz are described and interpreted in terms of the theory of nonlinear anelasticity. The theory predicts a linear relationship between the driving force of the excitation and the period of the auto modulation at its onset. This relation is substantiated by experiments performed with a natural α-quartz reed vibrating in flexure at resonance frequencies between 65 and 170 Hz in the temperature range of 162° and 224°C. The data suggests that Dauphiné twinning in α-quartz causes the auto modulation governed by an activation energy of 92 kJ mole. This activation energy characterizes short distance oxygen diffusion. © 1984.
A. Aning and M. Wuttig, "Dynamics Of Twinning In Natural Α-quartz," Journal of Physics and Chemistry of Solids, vol. 45, no. 5, pp. 481 - 485, Elsevier, Jan 1984.
The definitive version is available at https://doi.org/10.1016/0022-3697(84)90083-0
Materials Science and Engineering
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01 Jan 1984