The Debye 8 of diamond is 2000 K. its density is 3500 kg m* 3, its atomic weight is 12 and the interatomic spacing is 0-15 rim. Calculate the velocity of sound in diamond. Make an estimate of the dominant phonon wavelength at 300 K (see section 6.4) and calculate the frequency of lattice vibration to which this cor- responds.
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