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Structural properties of carbon films prepared by the pyrolysis of tetra chloro phthalic anhydride are investigated in an attempt to correlate it with the metal-insulator transition observed earlier as a function of deposition temperature, from electrical transport studies. Anomalous features are observed which evolve as the pyrolysis temperature is varied from 700 to 900°C. This includes prepeaks in the x-ray diffraction pattern in the region less than 1 Å Ϫ1 providing evidence for mediumdoi:10.1063/1.1491021 fatcat:j6nu2tpmwbbuxfl2etfxllrp7e