513.001 Molecular and Solid State Physics

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Physical
Constants

Periodic System
of Elements

      

Phonon bandstructures

CsI has a simple cubic Bravais lattice with a Cs atom at (0,0,0) and an I atom at (0.5 0.5 0.5) Which of the Figures below is the phonon dispersion curve for CsI? Explain your reasoning!