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Why the defects of the crystalline solid...

Why the defects of the crystalline solids are called thermodynamic defects?

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There is a perfect arrangement of constituent particles in a crystalline solid at 0K. As the temperature increases, the particles are likely to leave their lattice site and may occupy positions elsewhere. In other words, the defects are likely to increase with the rise in temperature. Therefore, these are called thermodynamic defects.
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