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Question

As mentioned in the lecture (introduction to imperfection in solids, 1st video) the respected sir said perfect crystals are found '''rarely' and not ' they dontd exist' so does that mean are found 1 in 1000?

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Solution

Perfect crystals are extremely rare in nature. And even when they exist, they are more of a close approximation to the theoretical perfect crystals.

There can be crystals called whiskers which have minimum internal and surface flaw. These are the best approximation to perfect crystals.

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