q8bsol - H omework Quiz #8B solution outline (a) You have a...

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3.091 Fall Term 2004 Homework Quiz #8B solution outline (a) You have a single crystal of gold. For each of the following defects, state whether you expect it to be present at room temperature and justify your answer with a brief explanation X grain boundaries No. Grain boundaries, by definition, separate different grains each of which is a region possessing the atomic arrangement of a single crystal. Hence, grain boundaries necessarily are found only in polycrystalline specimens. Y vacancies Yes. Vacancies are thermally activated, so even at room temperature there will be a fraction of unoccupied lattice sites.
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This note was uploaded on 11/02/2009 for the course CHEMISTRY 3.091 taught by Professor Donsadoway during the Fall '04 term at MIT.

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