Tis possible to produce a perfect crystalline solid that does not contain any vacancies?

False

Explanation:

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At first, we must take into account that in crystallography, vacancies account for the absence of an atom or molecule from a point that it would normally occupy in a crystal. In such a way, it has been widely studied that even crystalline solids have imperfections specially referred to vacancies created due to an eventual mechanical deformation of the crystal, rapid cooling from high temperature, or the impact of radiation on the crystal. Thus, it is false that one could produce a perfect crystalline solid that does not contain any vacancies.

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