The Properties of the Interstitial Compounds of Graphite. I. The Electronic Structure of Graphite Bisulfate

Abstract

1. The electrical resistance, its temperature dependence, and the Hall coefficients of graphite bisulfate compounds have been determined at various oxidation stages. The measurements have indicated that the oxidation removes electrons from a nearly full conduction band. 2. Reduction of the lamellar bisulfate compounds produces residue compounds which retain about a third of the bisulfate ions and half the sulfuric acid originally present in the lamellar compounds. The formula of the residue compounds is approximated by Cn·HSO4·4H2SO4. 3. The model of a hypothetical graphite which has lost electrons from its conduction band, is approximated closely by these residue compounds, since the impurities are distributed in a state of high disorder. The lamellar compounds, on the other hand, may distort the band structure of graphite because they form a superlattice.