Kinetics and mechanism of the dehydration of γ-FeOOH |
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| Authors: | Rudolf Giovanoli Rudolf Brütsch |
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| Affiliation: | Laboratory of Electron Microscopy, Institute of Inorganic Chemistry, University of Berne, 3 Freiestrasse, CH-3000 Berne 9 Switzerland |
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| Abstract: | The dehydration of γ-FeOOH to γ-Fe2O3 in vacuo has been investigated by thermoanalysis. Results have been checked by electron microscopy and diffraction and by x-ray diffraction. Authors find that formal kinetics are not conclusive. Electron micrographs, however, show directly that random nucleation occurs, producing perfectly oriented but disordered γ-Fe2O3 crystals of about 70 Å size. The results can be accomodated with an atomistic model of lattice collapse. |
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