A number of solid-gas reactions were carried out on cobalt compounds. Shape, porosity, crystallite size and crystallite misorientation of particles of the reacting solids as well as their changes during the reaction were studied. The results show that topotactic relationships are always present at the beginning of the reaction. As the reaction proceeds either they are maintained to a greater or lesser extent or the particles break up. Influence of the starting solid on growth of the product and occurence of resulting strains followed by their ease of relief seem to be the causes of the observed phenomena.
KeywordsCrystallite Size Orientation Relationship Reaction Proceeds Large Crystallite Strain Relief
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