You have a single crystal of 100% pure gold. Identify which of the following defects you would expect to be present at room temperature.
Choices:
Free surface
Grain boundaries
Vacancies
Inclusions
Substitutional impurity atoms
Interstitial impurity atoms
Here is an article that discusses three; i.e., point defects, linear defects, planar defects.
http://people.virginia.edu/~lz2n/mse201/mse201-defects.pdf
Noted.
vacancies
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Free Surface
Vacancies