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Graphite, is made of Carbon atoms linked together by covalent bonds. One of its uses is that it is used in making crucibles that can withstand very high

temperatures, and hence can be used to melt substances with a very high melting point. But, according to the properties of covalency, molecules or compounds with covalent bonds have a low melting point. So shouldn't the crucible itself melt before the substance melts? Please explain.


It is not made up of graphite alone. along with the graphite other materials are also used like sand, clay etc.
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but when sand and clay are added to graphite, it can mark on paper, and is therefore used in making pencil leads.... At least thats what the Dinesh Publications text book says
It use other substances that make it strong and good . It needs clay,sand,slits.etc
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