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]]>There are three distinct types of natural graphite which occur in different kinds of ore deposits:
4. Lump graphite (or vein graphite) occurs in fissure veins or fractures and appears as massive platy intergrowths of fibrous or acicular crystalline aggregates, and is probably hydrothermal in origin.
5.Highly ordered pyrolytic graphite refers to graphite with an angular spread between the graphite sheets of less than 1°.
*Synthetic graphite is a manufactured product made by high-temperature treatment of amorphous carbon materials. In the United States, the primary feedstock used for making synthetic graphite is calcined petroleum coke and coal tar pitch. This makes it very expensive to produce — up to 10 times the cost of natural graphite – and less appealing for use in most applications. The name “graphite fiber” is sometimes used to refer to carbon fibers or carbon fiber-reinforced polymer.
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