From the zone-center longitudinal optical phonon frequency for NaCl (8 THz -> rad/sec) calculate the interatomic force
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- From the zone-center longitudinal optical phonon frequency for NaCl (8 THz -> rad/sec) calculate the interatomic force constant and Young modulus for this material. From these data and density (2.18 g/cm 3 ) calculate the longitudinal sound velocity in NaCl.
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