Subject: Does temperature and/or state affect the resonance frequency of a material?

I read in the book Tesla: Man Out of Time, by Margaret Cheney that he had built 
a small resonance device that was able to cause a small earthquake, and i don't 
think it was the mechanical oscillator. I figured this worked through some 
electrical phenomenon (sp?), but if it worked by the vibration of atoms or 
molecules, wouldn't  the frequency where resonance was achieved vary based on 
the temperature of the medium? in a solid state wouldn't the frequency be much 
higher than in a gas, because the gas atoms/molecules would have farther to 
move.

Re: Does temperature and/or state affect the resonance frequency of a material?