Debye-Waller factors of FeCl3- and ICl-graphite intercalation compounds

Stage 2 and 3 FeCl3-graphite intercalation compounds (GICs) and stage 1-3 ICl-GICs are prepared by a two-bulb method. The stage structures of the GICs are studied by X-ray diffraction, and the GICs are characterized by the full width at half maximum of the (00l) diffraction peaks. The effective Debye-Waller (DW) factors of the well crystallized FeCl3-GICs and ICl-GICs along the c-axis are determined from the structure parameters, with which the minimum crystallographic R factor is obtained. The effective DW factors are found to decrease with increasing the stage number of the FeCl3-GICs and ICl-GICs. The DW factors of the constituent atoms, carbon, iron, and chlorine, in the FeCl3-GICs and those of carbon, iodine, and chlorine in the ICl-GICs are also determined.