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![Question A6
The phonon dispersion curve for sodium chloride in the [111] direction is shown below. The unit
cell parameter is a = 5.6402 Å.
Frequency (THz)
0
0.1
0.2 0.3
0.4
0.5
Reduced wavevector (EEE)
What is the speed of sound for longitudinal vibrations in this direction?](https://content.bartleby.com/qna-images/question/e2962121-0a97-46bc-b1d6-6f63cad67dd3/96731cb8-92b0-4171-8016-6f733e374ace/fj5zisv_processed.jpeg)
Transcribed Image Text:Question A6
The phonon dispersion curve for sodium chloride in the [111] direction is shown below. The unit
cell parameter is a = 5.6402 Å.
Frequency (THz)
0
0.1
0.2 0.3
0.4
0.5
Reduced wavevector (EEE)
What is the speed of sound for longitudinal vibrations in this direction?
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