Abstract
Graphite intercalation compounds with different stages ( n=2,3,4,5,6) were prepared by immersing the layer-type graphite into H 2SO 4 + HNO 3 + H 2O solution heating up these samples to different temperatures. The change of c-axis parameter can be determined by X-ray diffraction. The distance between the layers can be fitted with the following formula: ( n−1) d o +2 d I = (n+1)d (0 0 n+1) where d o=3.35 A is the interlayer distance between the interior carbon layers, d I=3.78 ± 0.02 A is the distance between the carbon-sulphuric acid layers, and d (0 0 n+1) represents the distance between the neighbouring (0 0 n+1) planes. It follows that the distance between the carbon-carbon layers d o for different stages is the same and the distance between the intercalated substance and the carbon layer d I also remains unchanged.
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