Polyaromatic Molecules Distributed at Random

Diamond [60,61] eliminates in advance all models and calculates the contribution of single aromatic molecules of increasing size distributed in a random orientation. This hypothesis was suggested by close similarity between the peaks of I(s) in [55-58] and graphite reflections 100 and 110, in addition to the absence of hkl reflections (see Tables 1.1 and 1.2). 

FIGURE 1.24 Aromatic molecules increasing in size as compared to carbon films (a) the molecules studied, (b) calculated interference functions, (c) interference function I(s) for thin carbon films. (Adapted from R. Diamond. X-ray diffraction data for large aromatic molecules. Acta Cryst. 10, 359-364 (1957) J. Kakinoki, K. Katada, and T. Hanawa. Heat treatment of evaporated carbon films. Acta Cryst. 13, 448-449 (1960). With permission.) 

Interference Functions /(s) of Aromatic Molecules Increasing in Size as Compared to Graphite (Calculated) 

Number of the Coronene Ovalene Single Aromatic Layer Graphite (Calculated)  

Source Data from R. Diamond. X-ray diffraction data for large aromatic molecules. Acta Cryst. 10, 359-364 (1957). With permission. 

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