Some organic crystals jump around when heated up. This happens because of an extremely fast change in their crystal structure. Scientists have now demonstrated that the crystals send out acoustic signals during this process, which may be useful in analyzing the characteristics of this phenomenon. The researchers demonstrated that this process is analogous to martensitic transitions observed in steel and some alloys.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2017/06/170615120614.htm
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