Abstract: The band structures of cesium graphite intercalation compound CsC₈ is calculated with the method put forward by Ohno, Nakao and Kamimura. The band bottom of 6S electrons of cesium lies 3.6eV above the Fermi level. Hence all the valence electrons of the cesium atom layer transfer to the antibonding π band of graphite carbon layers. The obtained band structure is in good agreement with that of other calculations.

Key words: energy band, graphite intercalation compound