Abstract
The authors have used Brillouin scattering to measure the thirteen independent elastic moduli of muscovite mica. The moduli reflect the monoclinic symmetry of the crystal, and demonstrate the anisotropy of the interlayer and intralayer bonding. The decrease in the acoustic velocity with increasing temperature is dominated by the decrease in the moduli that depend on interlayer bonding, giving an estimate of the temperature dependence of those moduli.
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