鑽石分為一型和二型兩種，這主要是根據它是否含有N元素：一型含；二型不含。而藍色的鑽石是二B型的，是半導體。The extreme hardness of diamond in selected orientations causes it to be helpful in materials science, as Within this pyramidal diamond embedded in the Performing surface area of a Vickers hardne
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