Development of Ammonium-Saponites from Gels with Variable Ammonium Concentration and Water Content at Low Temperatures

@article{Kloprogge1993DevelopmentOA,
  title={Development of Ammonium-Saponites from Gels with Variable Ammonium Concentration and Water Content at Low Temperatures},
  author={J. Theo Kloprogge and Johan Breukelaar and J. Ben H. Jansen and John Wilhelm Geus},
  journal={Clays and Clay Minerals},
  year={1993},
  volume={41},
  pages={103-110}
}
Ammonium-saponite is hydrothermally grown at temperatures below 300°C from a gel with an overall composition corresponding to (NH4)0.6Mg3Si34Al0.6O10(OH)2. The synthetic saponite and coexisting fluid have been characterized by means of X-ray powder diffraction, X-ray fluorescence, Induced Coupled Plasma-Atomic Emission Spectroscopy, thermogravimetric analysis, transmission electron microscopy, CEC determination using an ammonia selective electrode, and pH measurement. In the crystallization… Expand

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References

SHOWING 1-10 OF 28 REFERENCES
Characterization of Synthetic Na-Beidellite
Na-beidellite, a member of the smectite group, was grown hydrothermally from a gel of composition 0.35Na2O·2.35Al2O3·7.3SiO2 in NaOH solutions at a pH between 7.5 and 13.5, a pressure of 1 kbar, andExpand
Preparation and Characterization of Bidimensional Zeolitic Structures Obtained from Synthetic Beidellite and Hydroxy-Aluminum Solutions
Beidellite was synthesized hydrothermally from a noncrystalline gel at 320°C and 130 bar pressure. The beidellitic character of the product was verified by infrared spectroscopy on the NH4+-exchangedExpand
Rheological Properties of Organophilic Synthetic Hectorites and Saponites
To determine the dependency of rheological properties on mineralogical characteristics, eleven organophilic hectorite and nine organophilic saponite samples were prepared from hydrothermallyExpand
Synthesis and Swelling Properties of Saponites with Increasing Layer Charge
Nine synthetic Na-saponites with charge densities varying between 0.33 and 1.0 have been prepared. Their swelling properties and structural organization in water, ethylene glycol and glycerol showExpand
Pillared clays : preparation and characterization of clay minerals and aluminum-based pillaring agents
After an extensive introductory chapter (Chapter I), in which the background and the aim of the research is dealt with, the hydrothermal synthesis and the characterization of Na-beidellite isExpand
Controlled Synthesis of Heteropolytypic (Mixed-Layer) Clay Minerals
The conditions for the formation of various heteropolytypic or mixed-layer phases were determined in a hydrothermal study of synthetic mixtures along the join talc—Na-saponite—Na-phlogopiteExpand
Cross-Linked Smectites. III. Synthesis and Properties of Hydroxy-Aluminum Hectorites and Fluorhectorites
Interaction of La3+- and Ce3+-exchanged hectorites with oligomeric hydroxy-Al cations results in the formation of cross-linked hectorites possessing moderately high surface areas (~ 220–280 m2/g) andExpand
Pillaring Processes of Smectites with and Without Tetrahedral Substitution
Pillaring of montmorillonite and beidellite with aluminum polyhydroxypolymer takes place first by the saturation of the cation-exchange capacity by monomeric and/or dimeric aluminum hydroxide speciesExpand
Cross-Linked Smectites. V. Synthesis and Properties of Hydroxy-Silicoaluminum Montmorillonites and Fluorhectorites
Solutions containing hydroxy-SiAl (HSA) oligocations were prepared by two procedures: (1) treatment of a mixture of orthosilicic acid and AlCl3 with aqueous NaOH, followed by aging of the product;Expand
Partitioning of divalent transition elements between octahedral sheets of trioctahedral smectites and water
Using trioctahedral smectites synthesized at low temperature (25 and 75°C). partition coefficients have been determined for M2+ transition metals (Mn, Fe, Co, Ni, Cu, Zn) between octahedral sheets ofExpand
...
1
2
3
...