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Paramagnetic Fe3+: A Sensitive Probe for Disorder in Kaolinite
Disorder Electron Paramagnetic Resonance (EPR) Fe3+ Irradiation Kaolinite Point Defect
2011/12/22
Abstract: The Fe3+ substituted for Al3+ at the 2 octahedral positions is one of the most common impurities in the kaolinite structure detected by electron paramagnetic resonance (EPR). Evidence has be...
Mobility of Small Molecules in Interlayers of Hectorite Gels: ESR Study with an Uncharged Spin Probe
ESR Hectorite Molecular mobility
2011/12/29
Electron spin resonance (ESR) spectroscopy was used to measure the rotational mobility of an uncharged nitroxide spin probe (4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy) in hectorite gels of variable...
Vibrational Probe Studies of Water Interactions with Montmorillonite
Cation exchange Desorption isotherm FTIR Gravimetric Montmorillonite Physisorption • Water
2011/12/31
Interaction of water with montmorillonite exchanged with Na+, K+, Co2+, and Cu2+ cations as a function of water content was examined using an FTIR/gravimetric cell designed to collect spectroscopic an...
Organic Anion Adsorption on Aluminum Hydroxides: Spin Probe Studies
Adsorption Aluminum hydroxide Boehmite Carboxylate Electron spin resonance Gibbsite Organophosphate
2012/2/8
The nature of organo-phosphate and carboxylate bonding in aqueous suspensions of noncrystalline alumina, boehmite, and gibbsite has been studied using the anionic nitroxide spin probes 3-carboxy-2,2,5...
The Conversion of X-Ray Intensity Ratios to Composition Ratios in the Electron Probe Analysis of Small Particles Using Mineral Standards
Albite Biotite Illite Kaolinite Orthoclase Phlogopite
2012/2/10
X-ray intensity ratios of Si/Al, Si/Fe, and Al/Fe in micron-sized particles of geochemical standards were found to vary linearly with the composition ratio. The same linear relationship was found for ...
Properties of Reduced Charge Montmorillonites: Hydrated Cu(II) Ions as a Spectroscopic Probe
Montmorillonites Hydrated Cu(II) Ions Spectroscopic Probe
2011/11/18
Abstract: A series of Cu(II) reduced charge montmorillonites (RCM) of varying charge reduction has been prepared by exchange of the parent Li(I)-Na(I) mineral with CuCl2 in 95 per cent ethanol solutio...