Dehydration of γ-FeOOH: Direct Observation of the Mechanism
The dehydration of γ-FeOOH to γ-Fe2O3 has been investigated by thermoanalytical, electron microscopic and X-ray diffraction methods, using single crystals of suitably small size as a starting material, in order to maintain short diffusion paths. While kinetical data alone are not conclusive, the el...
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| Main Authors: | , |
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| Format: | Article |
| Language: | deu |
| Published: |
Swiss Chemical Society
1974-04-01
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| Series: | CHIMIA |
| Online Access: | https://www.chimia.ch/chimia/article/view/9138 |
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| Summary: | The dehydration of γ-FeOOH to γ-Fe2O3 has been investigated by thermoanalytical, electron microscopic and X-ray diffraction methods, using single crystals of suitably small size as a starting material, in order to maintain short diffusion paths. While kinetical data alone are not conclusive, the electron micrographs show unambiguously how the reaction proceeds in the crystals: Strings of perfectly oriented γ-Fe2O3 crystallites of about 70 Å diameter and disordered lithium site vacancies extend into the undecomposed matrix crystal which can be distinguished from decomposed parts by direct imaging of the (120) lattice planes of 3 Å spacing. An atomistic interpretation of this result is given.
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| ISSN: | 0009-4293 2673-2424 |