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Influence of Nonstoichiometry and the Presence of Maghemite on the Mossbauer Spectrum of Magnetite
Magnetite Mossbauer effect Nonstoichiometric magnetite
2011/12/28
Several samples of large- and small-particle magnetite (Fe3O4), as well as its thermal decomposition products formed at different temperatures and atmospheres, have been studied extensively by Mö...
Effect of Pellet Pressing on the Infrared Spectrum of Kaolinite
Kaolinite Diffuse reflectance infrared Kaolinite hydroxyls Kaolinite pressing
2011/12/31
Diffuse reflectance infrared (IR) spectra show that pressing kaolinite into pellets for transmission IR studies changes relative intensities of hydroxyl peaks between 3700–3600 cm−1. The magnitu...
Further Consideration of the 29Si Nuclear Magnetic Resonance Spectrum of Kaolinite
Hydrazine Hydrogen bond Kaolinite Nuclear magnetic resonance Stacking fault
2011/11/25
Abstract: The introduction of artificial ±b/3 stacking faults into well-crystallized kaolinite by intercalating and removing hydrazine had no observable effect on the solid-state 29Si nuclear magnetic...
Influence of Al Substitution and Crystal Size on the Room-Temperature Mossbauer Spectrum of Hematite
Aluminum Hematite Iron Mossbauer spectroscopy Particle size
2011/11/25
Abstract: Mossbauer spectra of 15 hematites with Al substitutions between 0 and 10 mole % were taken at room temperature. X-ray powder diffraction indicated dimensions of these hematites in the c-dire...
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...
The I.R. Spectrum of Structural Hydroxyls of K-Depleted Biotites
I.R. Spectrum Structural Hydroxyls K-Depleted Biotites
2012/2/15
The i.r. spectrum of K depleted biotites (structural OH stretching range) has been studied with monocrystals equilibrated at various water contents. Prior to spectroscopic measurements, the samples we...