Glasses are an enigma among solid phases. Like crystalline solids they are hard, but unlike crystals they are amorphous on the molecular scale. Because of this structural disorder, each piece of glass is technically out of equilibrium, and unique. As a result, its properties depend not only on its chemical ingredients, but on how it was cooled.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/2BssJ9z
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