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Diamond Crystal Characteristics

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　　Crystal Structure: Diamond belongs to the cubic crystal system , where each carbon atom forms covalent single bonds with four neighboring carbon atoms in sp3 hybridized orbitals, constituting an orthotetrahedral structure. This structure makes diamond has very high hardness, is the hardest known substance.
　　Morphology: Diamond crystals usually exhibit octahedral or rhombic dodecahedral morphology, which is determined by the symmetry of its crystal structure. Pure diamond is colorless and transparent. If it contains impurities, it may show different colors such as yellow, blue, green and black.
　　Physical Properties: Diamond has a hardness  of 10 on the Mohs scale and a specific gravity between 3.47-3.53. When heated to 1000℃, diamond can be slowly transformed into graphite. Diamond emits blue-green fluorescence under X-ray irradiation, and this property is used for beneficiation from mineral sands.
　　Chemical Properties: Diamond is chemically stable, but can react with oxygen at high temperatures and pressures. Pure diamond is not electrically conductive, but may have semiconducting properties when containing impurities.
　　Applications: Due to its high hardness and thermal stability, diamond is widely used in fine abrasive materials, high hardness cutting tools , all kinds of drills , wire drawing dies  and other fields. In addition, diamond is also used to make high-grade jewelry and materials for scientific research.
　　In summary, diamond plays an important role in many fields with its unique crystal structure, physical and chemical properties.

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