Graphite

Graphite is a crystalline carbon. Hexagonal crystal system, from iron ink to dark grey. Density of 2.25 g/cm 3, 1.5 hardness, melting point 3652 ℃, boiling point of 4827 ℃. Soft, greasy, conductive. Chemical property is not active, corrosion-resistant, and acid, alkali and other difficult reaction. Heat is intensified in air or oxygen and can be burned to produce carbon dioxide. A strong oxidizer will oxidize it into organic acids. Used as antifriction and lubricating materials, crucible, electrode, dry battery, pencil core. High purity graphite can be used as a moderator in nuclear reactors. It is often referred to as carbon or black lead because it was previously mistaken for lead.