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Mechanism of Sulfate Adsorption by Kaolinite
Adsorption Bidentate Hydroxyl Kaolinite Monodentate Sulfate
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2012/2/6
Sulfate adsorption on kaolinite was followed at 0.7 礶q/ml to 99 礶q/ml solution concentrations at 30癈 and at pH 6.0, and the amount of OH− ions released and the change in surface charge were dete...
Comparison of Intercalation Methods for Differentiating Halloysite from Kaolinite
Formamide Halloysite Hydrazine Intercalation Kaolinite Potassium acetate Test
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2012/2/6
The intercalation of formamide, potassium acetate, and hydrazine by halloysite and/or kaolinite-rich samples, with and without subsequent displacement of the interlayer species by water or glycerol/wa...
Intercalation Method Using Formamide for Differentiating Halloysite from Kaolinite
Formamide Halloysite Intercalation Kaolinite N-methylformamide Test
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2012/2/6
A rapid and simple test to distinguish halloysite from kaolinite in mineral mixtures has been developed based on differences in the rate and extent of formamide intercalation. With halloysite, complex...
Simplified, Complete CsCl-Hydrazine-Dimethylsulfoxide Intercalation of Kaolinite
Dimethylsulfoxide Expansion Intercalation Kaolinite X-ray powder diffraction
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2012/2/2
The coarse (2−0.2 µm) and fine (<0.2 µm) size fractions of several soil and reference kaolinite samples were completely intercalated and expanded to 11.2 Å using a simplified C...
Spherical Kaolinite: Synthesis and Mineralogical Properties
Halloysite High resolution electron microscopy Infrared spectroscopy Kaolinite Spherules Synthesis X-ray powder diffraction
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2012/2/7
Spherical kaolinite has been synthesized for the first time from noncrystalline aluminosilicate material in hydrothermal experiments conducted between 150° and 250°C and under autogenous vapor pressur...
Atom Positions in Highly Ordered Kaolinite
Crystal structure Dickite Hydrogen atom Hydroxyl orientation Kaolinite Rietveld method
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2012/2/7
The crystal structure of kaolinite (P1, a = 5.153 (1), b = 8.941 (1), c = 7.403 (1) 侌, 兛 = 91.692(3)亱, 兝 = 104.860(3)亱, 兞 = 89.822(3)亱, specimens from Keokuk geodes) has been refined in detail and tha...
Hydrogen Atom Positions in Kaolinite by Neutron Profile Refinement
Crystal structure Hydrogen Kaolinite Neutron profile refinement O-H vector Rietveld method
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2012/2/7
A structure refinement of kaolinite made using the Rietveld neutron profile refinement technique has given non-hydrogen atom positions which were not significantly different from those given by B. B. ...
Calculation of Electrostatic Interlayer Bonding Energy and Lattice Energy of Polar Phyllosilicates: Kaolinite and Chlorite
Chlorite Electrostatic energy Interlayer bonding Kaolinite Lattice energy
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2012/2/6
The electrostatic lattice energy of polar phyllosilicates can be calculated when a correction term Ecorr equal to −2鸬2/V is taken into account, where ?is the dipole moment of a slice d(001) and ...
Transformation of Iron-Bearing Kaolinite to Iron-Free Kaolinite, Goethite, and Hematite
Goethite Hematite Iron Kaolinite Mossbauer spectroscopy Oxidation Pseudomorphism
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2012/2/7
Ferruginous clay partings in limestones of the marine, largely evaporitic, Upper Triassic Mohila Formation (Makhtesh Ramon, Israel) contain hexagonal plates and cube-like bodies up to one millimeter a...
Adsorption of Alkylphosphoric Acid on Kaolinite and Smectite in Water-Decane
Adsorption Alkylphosphoric acid Kaolinite Montmorillonite Phosphate polyanions Smectite
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2012/2/7
Bis-ethyl 2-hexylphosphoric acid (di-2 EHPA) dissolved in decane is chemisorbed on kaolinite and montmorillonite dispersed in an acidic aqueous solution. The adsorption results in the formation of com...
Hydrothermal Formation of a Kaolinite-Like Product from Noncrystalline Aluminosilicate Gels
Aluminosilicate Gel Infrared spectroscopy Kaolinite Synthesis X-ray powder diffraction
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2012/2/8
Noncrystalline aluminosilicate gels with Al2O3/(Al2O3 + SiO2) weight ratios from 0.3 to 0.5 were reacted in 0.1 N KOH at temperatures varying from 125° to 175°C. The pH of the solutions dropped sharpl...
Application of Electron Paramagnetic Resonance and Mossbauer Spectroscopy in the Investigation of Kaolinite-Group Minerals
Dickite Electron paramagnetic resonance Halloysite Iron Kaolinite Mossbauer spectroscopy Nacrite
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2011/11/22
Abstract: Samples of nacrite, dickite, kaolinite, and halloysite were investigated using X-band electron paramagnetic resonance (EPR) and Mössbauer spectroscopy. Fe3+ gave rise to EPR signals at ...
Adsorption of Alkylphosphoric Acid on Kaolinite and Smectite in an Organic Medium (Decane)
Adsorption Alkylphosphoric acid Hectorite Infrared spectroscopy Kaolinite Smectite Surface reactions
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2012/2/8
Di-ethyl 2-hexylphosphoric acid (di-2 EHPA) was chemisorbed on kaolinite and smectite in decane solution. The resultant isotherms were of the Langmuir type and made possible the determination of limit...
Chromium-Bearing Dickite and Chromium-Bearing Kaolinite from Teslic, Yugoslavia
Chromium Dickite Infrared Kaolinite Optical absorption
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2012/2/8
Three samples of bluish chromium-bearing dickite and chromium-bearing kaolinite were examined by X-ray powder diffraction, chemical analysis, electron microprobe, optical, and infrared techniques to d...
Synthesis of Mixed-Layer Kaolinite/Smectite
Interstratification Kaolinite Mixed layer Montmorillonite Smectite Synthesis
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2012/2/9
Mixed-layer kaolinite/smectites containing 40–90% kaolinite layers have been synthesized from Wyoming smectite. Run times were 4 months at 156°C in solutions of AlCl3·6H2O and KCl or CaCl2. Similar KC...