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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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?

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.

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.