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120. An electron microscopic investigation of the graphite-water reaction

✍ Scribed by G.L Montet; G.E Myers

Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
128 KB
Volume
6
Category
Article
ISSN
0008-6223

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✦ Synopsis

REACTIVITY AND SURFACES 225

revealed. The method enables the dimensions of each crystallite to be determined directly; the degree of parallelism of adjacent crystallites to be estimated; and the nature of the interface separating any given pair of crystallites to be characterized. Boundaries of pure tilt, of pure twist and of mixed character may be identified from the trace of the interface plane (developed by catalytic oxidation) on the basal surface. Large variations in the reactivity from one crystallite to another within a single crystal have been noted, there being evidence to suggest that some residual lattice impurities (analyzed mass-spectrographically) and localized accumulations of lattice defects (particularly vacancies) may be important in this connection. The implications of these findings in relation to studies of reactivity and diffusion are briefly discussed (15 min).

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