Vaporization of graphite in the argon‐helium plasma arc at atmospheric pressure has been carried out. Carbon soot sample was deposited on the wall of the arc chamber in a higher deposition rate. Small amounts of was identified in the product by means of visible‐UV spectroscopy and x‐ray diffraction methods. The existence of in the benzene soluble fraction of the deposit was made sure by means of Raman spectroscopy as well as by Mass spectroscopy.