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Bronsted Acidification Observed during Hydrothermal Treatment of a Calcium Montmorillonite
Aluminium Ca-smectite Gibbsite-type intercalates
2011/12/30
An aluminous Ca-montmorillonite from southern Manitoba, Canada, has been shown to generate very low pH values in clay/groundwater slurries over a range of ionic strength of the groundwater (fresh and ...
Transformation of Birnessite to Buserite, Todorokite, and Manganite under Mild Hydrothermal Treatment
Birnessite Buserite High-resolution transmission electron microscopy Hydrothermal Manganite Todorokite
2012/1/11
Investigations were conducted to determine the hydrothermal transformations of synthetic birnessite exchanged with different metal ions. Autoclaving in a Teflon-lined stainless steel pressure vessel a...
Hydrothermal Treatment of Smectite, Illite, and Basalt to 460°C: Comparison of Natural with Hydrothermally Formed Clay Minerals
Basalt Berthierine Hydrothermal Illite Smectite Stability
2012/1/11
Wyoming bentonite, Fithian illite, and basalt from the Umtanum Formation, Washington, were treated hydrothermally at 200° to 460°C and 260 to 500 bars for 71 to 584 days. No change was detected for th...
Potassium Fixation by Clay Minerals during Hydrothermal Treatment
Diagenesis Fixation Hydrothermal Interstratification Montmorillonite Potassium Rectorite
2012/2/6
The amount of K fixed in K- and Ca-saturated montmorillonite, vermiculite (trioctahedral), rectorite-type and IMII-ordered mica/montmorillonites was measured as a function of time (1–64 days), tempera...