According to works of Spooner, activation energy value of phonon modes in feldspars is around 0.05 eV. Is this the same to quartz or other materials?

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Bing-Yuh Lu

maybe, follow the equation e=hu

the Planck-Einstein relation

MUNISH KUMAR

Agreed@Lu. Possibly the modes of vibrations; say w=(k/m)^0.5 where k is spring constant and m is reduced mass; may guide the phonon energy i.e. phonon dispersion relation etc. since spring constants or other constants say C11 etc are different for different materials; activation energy will be different. However, drastic difference is present or not? It appears that may not be the case.