Electronic structure of graphite fluorides

Results of X-ray fluorescent measurements of carbon-fluorine compounds are presented. We have measured carbon and fluorine K alpha X-ray emission spec tra (2p --> 1s transition) of graphite fluorides (CF)(n) and (C2F)(n). We f ound that carbon atoms are of the sp(3) type and covalently bound to fluori ne. Our measurements show that results of band structure calculations based on chair-type structure of (CF)(n) are not confirmed by comparison of carb on and fluorine emission spectra in the binding energy scale. Therefore the crystal structure of graphite fluorides is still not solved and must be re fined. (C) 2001 Elsevier Science B.V. All rights reserved.