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Role of Ferric Iron in the Oxidation of Hydrocortisone by Sepiolite and Palygorskite
Catalysis Electron spin resonance Hydrocortisone Iron Oxidation Palygorskite Sepiolite
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2012/2/6
The role of adsorbed and structural Fe3+ in palygorskite and sepiolite with respect to the oxidation of hydrocortisone in aqueous suspension has been evaluated using electron spin resonance and UV-vis...
Palygorskite-Sepiolite Clays of Lebrija, Southern Spain
Genesis Palygorskite Sedimentation Sepiolite Spain
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2012/2/7
The Upper Pliocene sediments near Lebrija in southern Spain contain commercial deposits of palygorskite and sepiolite. These sediments of continental origin consist chiefly of carbonate, marl, and cla...
Mossbauer Studies of Palygorskite and Some Aspects of Palygorskite Mineralogy
Infrared spectroscopy Iron Mossbauer spectroscopy Palygorskite Sepiolite Thermal treatment X-ray powder diffraction
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2012/2/8
Fe3+ ions in palygorskite occupy sites at the edges and in the interior of the alumino-silicate chains. The M鰏sbauer parameters of the doublets associated with Fe3+ ions in edge sites indicate that th...
A Macrocrystalline Attapulgite-Palygorskite Occurrencein Calcite Veins
Attapulgite-Palygorskite Calcite Veins
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2011/11/4
Fibrousa ttapulgite-palygorskitwei,t h fibersg enerallym easurings everaml illimetersin length,i s found associatewd ith calcitei n hydrothermallyd epositedv eins.T he veinsr epresenftr acturef illing...
Discussion of the Occurrence and Origin of Sedimentary Palygorskite-Sepiolite Deposits
Palygorskite-Sepiolite Deposits Discussion
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2012/2/15
Marine and non-marine palygorskite-sepiolite deposits are found throughout the world and occur interbedded with chert, dolomite, limestone, phosphates and other non-detrital sedimentary rocks. The ori...
DISCUSSION OF THE OCCURRENCE AND ORIGIN OF SEDIMENTARY PALYGORSKITE-SEPIOLITE DEPOSITS
SEDIMENTARY PALYGORSKITE-SEPIOLITE DEPOSITS attapulgite
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2011/11/15
Marine and non-marine palygorskite-sepiolite deposits are found throughout the world and occur interbedded with chert, dolomite, limestone, phosphates and other non-detrital sedimentary rocks. The ori...
Kinetics of Acid-Dissolution of Palygorskite (Attapulgite) and Sepiolite
Kinetics Acid-Dissolution Palygorskite Attapulgite Sepiolite
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2012/2/20
Palygorskite and sepiolite were digested with large excesses of hydrochloric acid at constant temperature for various periods of time. The reaction was found to be of first order with respect to the m...
KINETICS OF ACID-DISSOLUTION OF PALYGORSKITE (ATTAPULGITE) AND SEPIOLITE
PALYGORSKITE ATTAPULGITE SEPIOLITE
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2011/11/4
Palygorskite and sepiolite were digested with large excesses of hydrochloric acid at constant temperature for various periods of time. The reaction was found to be of first order with respect to the m...
PALYGORSKITE: NEW X-RAY DATA
PALYGORSKITE X-RAY DATA
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2011/11/4
Anaiysis of X-ray diffraction powder data for five palygorskite samples shows that three of the samples are orthorhombic and two are monoclinic Retaining the same cell setting for all palygorskites, i...