Evolution of hydrogen on dehydroxylation of clay minerals

Evolution of hydrogen on dehydroxylation of clay minerals

Mass spectra showed that H2 evolved on vacuum heating of kaolinites, halloysite and sepiolite but not on vacuum heating of the montmorillonite samples studied. Release of H2 occurred during clay dehydroxylation, but reached its maximum at a higher T. It was independent of the amount of Fe2+ or Fe3+...

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Veröffentlicht in:The American mineralogist 1989-08, Vol.74 (7-8), p.818-820
Hauptverfasser: Heller-Kallai, Lisa, Miloslavski, Irena, Grayevsky, A
Format: Artikel
Sprache:eng
Schlagworte:
clay mineralogy
clay minerals
crystal chemistry
dehydration
dehydroxylation
experimental studies
gases
geochemistry
hydrogen
hydroxyl ion
mass spectra
Mineralogy
minerals
sheet silicates
silicates
spectra
thermal effects
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Zusammenfassung:Mass spectra showed that H2 evolved on vacuum heating of kaolinites, halloysite and sepiolite but not on vacuum heating of the montmorillonite samples studied. Release of H2 occurred during clay dehydroxylation, but reached its maximum at a higher T. It was independent of the amount of Fe2+ or Fe3+ present in the clay. [Authors' abstract]
ISSN:0003-004X
1945-3027