Reactions of ammonium sulphates with kaolinite and other silicate and oxide minerals
| Autor: | M. Mueller-Vonmoos, G. Bayer, G. Kahr |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Oxide minerals
Inorganic chemistry 020101 civil engineering 02 engineering and technology engineering.material 010502 geochemistry & geophysics 01 natural sciences Silicate 0201 civil engineering Metal chemistry.chemical_compound Bauxite chemistry Geochemistry and Petrology visual_art visual_art.visual_art_medium engineering Kaolinite Ammonium Clay minerals 0105 earth and related environmental sciences |
| Zdroj: | Clay Minerals. 17:271-283 |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/claymin.1982.017.3.01 |
| Popis: | Interactions of ammonium sulphates and various silicate and oxide minerals have been studied by X-ray heating methods and simultaneous TG-DTA. Kaolinite and other clay minerals were found to be very susceptible to these sulphating treatments, (NH4)3Al(SO4)3, (NH4)Al(SO4)2 and Al2(SO4)3 being formed successively with increasing temperature from 350 to ∼550°C. The same reaction products were obtained on heating mixtures of (NH4)2SO4 and γ-Al2O3, Al(OH)3 and bauxite. Fe-, Mg- and Ti-silicates and oxides gave NH4-double sulphates below 400°C and the corresponding metal sulphates above this temperature. |
| Databáze: | OpenAIRE |
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