DEBYE-WALLER FACTORS OF ICL-GRAPHITE INTERCALATION COMPOUNDS PREPAREDFROM NATURAL GRAPHITE FLAKES AND GRAPHITIZED POLYIMIDE FILMS

Stages 1-3 ICl-graphite intercalation compounds (GICs) are prepared fr om natural graphite flakes and graphitized polyimide films by an ordin ary two-bulb method. The stage structures are studied by X-ray diffrac tion, and the Debye-Waller(DW) factors are determined by minimizing th e crystallographic R factor. The effective DW factors of stage 1-3 ICl -GICs from natural graphite flakes decrease with increasing stage numb er, indicating that the stiffness of the GICs along the c-axis increas es with increasing stage number. The effective DW factor of the stage 1 ICl-GIC from graphitized polyimide film is smaller than that from na tural graphite flakes. The DW factors of the respective carbon, iodine and chlorine atoms in the ICl-GICs are also determined.