With hot oxidizing agents, Metilic acid C 6(CO 2H) 6 is obtained.Īmong the halogens only fluorine (F) reacts with carbon.Īt ambient temperature (Room temperature) carbon tetrafluoride (CF 4) is gas, tetrachloride (CCl 4) is liquid and the other two compounds are solids.ĬAS Number: CAS (graphite), CAS (diamond) The hexagonal Alpha can be converted to the Beta by mechanical treatment, and when heating it above the 1000☌ beta form reverts to the Alpha.Įlemental carbon is an inert substance, which is insoluble in water, diluted acids and bases, as well as organic solvents.Īt high temperatures carbon binds with oxygen to form carbon monoxide (CO) or dioxide (CO 2). Graphite exists in two forms: Alpha (α) and Beta (β), where Naturally occurring graphites are contain as much as 30% of the Rhombohedral (beta) form, whereas synthetic materials contain only the alpha form. Physical and Chemical properties of carbon depend on the crystalline structure of the element. “White” carbon is a transparent birefringent material. Graphite is one of the softest known materials while diamond is one of the hardest. And a fourth form is known as “white” carbon, Other forms with little crystallinity are vegetal carbon and black fume.
Bibliographic Databases on Atomic Spectroscopy of CarbonĮlemental carbon exists in three allotropic crystalline forms: Diamond, Graphite, and Fullerines.
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