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Cross-Linked Smectites. I. Synthesis and Properties of Hydroxy-Aluminum-Montmorillonite
Aluminum Electrostatic Hydroxide Oligomer Montmorillonite
2012/2/10
A stable porous system consisting of montmorillonite cross-linked by Al-hydroxide oligomers was synthesized by reacting at room temperature an aqueous solution of such oligomers with a unit-layer disp...
Reduction and Oxidation of Fe3+ in Dioctahedral Smectites桰II.* Oxidation of Octahedral Iron in Montmorillonite
Exchange Iron Oxidation Reduction
2012/2/10
Structural Fe2+ in montmorillonite is readily oxidized by contact with water, salt solutions or on mild heating. This is shown clearly by the M鰏sbauer spectra and is associated with a sharpening of th...
The Co-ordination of Hydrated Cu(II)- and Ni(II)-Ions on Montmorillonite Surface
Co-ordination Montmorillonite Surface optical spectra
2012/2/13
The optical spectra of Cu2+ and Ni2+ on Camp Berteau montmorillonite after lyophilization and evacuation at room temperature are characteristic for the presence of Cu(H2O)42+ and Ni(H2O)62+ in the int...
A Proposed Phase Diagram for Illite, Expanding Chlorite, Corrensite and Illite-Montmorillonite Mixed Layered Minerals
Illite Expanding Chlorite Corrensite Illite-Montmorillonite Mixed Layered Minerals
2012/2/13
New and published experimental data on hydrothermally treated (2-kbar water pressure, 300–400°C natural clay minerals is used to construct phase diagrams in composition and pressure-temperature space ...
A study has been made of the interaction of azobenzene vapor with a series of cation-exchanged montmorillonites. Cu 2+ -and Ag+ -clays give basal spacings ⩾ 20侌. The azobenzene retains its tran...
Change of b-Dimension with Swelling of Montmorillonite
b-Dimension Swelling Montmorillonite
2012/2/13
The effect of swelling on the b-dimension of Na-saturated, Upton, Wyoming montmorillonite was re-examined using powdered silicon as an internal standard. After being corrected with reference to the in...
Microporosity in Montmorillonite from Nitrogen and Carbon Dioxide Sorption
Microporosity Montmorillonite Carbon Dioxide Sorption
2012/2/13
Nitrogen adsorption at 78亱K and carbon dioxide sorption at 195亱K on homoionic lithium, sodium, caesium, calcium, lanthanum and hexane diammonium saturated montmorillonites have been examined by means ...
The Orientation and Interaction of Ethylenediamine Copper (II) with Montmorillonite
Orientation Interaction Ethylenediamine Copper Montmorillonite
2012/2/13
The d(001) spacings for a series of montmorillonite samples containing increasing amounts of Cu(en)32+ were recorded after exposure to 50% humidity, 10% humidity, and air that had been saturated with ...
Interaction of Petroleum Heavy Ends with Montmorillonite
Interaction Petroleum Heavy Ends Montmorillonite
2012/2/13
Adsorption of asphaltenes and resins onto montmorillonite occurs rapidly and to a large extent irreversibly under near-anhydrous laboratory conditions. Factors which influence the adsorption are the e...
Clay Mineral Stability as Related to Activities of Aluminium, Silicon, and Magnesium in Matrix Solution of Montmorillonite-Containing Soils
Clay Mineral Stability Aluminium Silicon Magnesium Montmorillonite-Containing Soils
2012/2/13
The influence of geomorphological site characteristics on soil clay mineral stability of montmorillonite-containing horizons of a southern Wisconsin soil catena was interpreted in terms of the solute ...
Effect of Swelling on the Infrared Absorption Spectrum of Montmorillonite
Swelling Infrared Absorption Spectrum Montmorillonite
2012/2/13
The i.r. spectra of mixtures of different Na-montmorillonites were determined at several water contents between 2 and 22 g of water/g of montmorillonite. It was found that Si—O absorption is represent...
Effect of Compaction on the Pore Fluid Chemistry of Montmorillonite
Compaction Pore Fluid Chemistry Montmorillonite
2012/2/13
An apparatus for consolidating fine grained materials under controlled conditions of total stress, pore fluid pressure and temperature is described and the variation in chemistry of pore fluid expelle...
Montmorillonite Pseudomorphs after Amphibole from Melbourne, Australia
Montmorillonite Pseudomorphs Amphibole
2012/2/13
Well developed smectite “crystals” up to 10 mm long, which probably are pseudomorphic after titaniferous hornblende phenocrysts, are present in a weathered dike in a Melbourne clay pit. The pseudomorp...
Montmorillonite-Alkali Halide Interaction: A Possible Mechanism for Illitization
Montmorillonite-Alkali Halide Interaction Mechanism Illitization
2012/2/15
The reaction products obtained when montmorillonites react with potassium halide at elevated temperatures, which were described in a previous publication, are further characterized. On the basis of th...
Adsorption Of Ethylenediamine (EDA) On Montmorillonite Saturated with Different Cations—V. Ammonium- and Triethylammonium-Montmorillonite: Ion-Exchange, Protonation and Hydrogen-Bonding
Triethylammonium-Montmorillonite Adsorption Ethylenediamine
2012/2/15
On NH4- as well as on (C2H5)3NH-montmorillonite EDA was adsorbed in protonated form. The extent of protonation depended on the relative basicities and concentrations of the interacting compounds. In t...