Must have the structure of this.
Property of Diamond.
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has a very high melting point (almost 4000°C). Very strong carbon-carbon covalent bonds have to be broken throughout the structure before melting occurs.
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is very hard. This is again due to the need to break very strong covalent bonds operating in 3-dimensions.
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doesn't conduct electricity. All the electrons are held tightly between the atoms, and aren't free to move.
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is insoluble in water and organic solvents. There are no possible attractions which could occur between solvent molecules and carbon atoms which could outweigh the attractions between the covalently bound carbon atoms.
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