Thermal analysis of selected illite and smectite clay minerals. Part I. Illite clay specimens

2005 ◽  
pp. 270-286 ◽  
Author(s):  
C. M. Earnest
Keyword(s):  
Thermal Analysis ◽  
Clay Minerals ◽  
Smectite Clay

Thermal study of some manganese oxide minerals

1950 ◽  
Vol 29 (210) ◽  
pp. 239-251 ◽  
Author(s):  
J. Laurence Kulp ◽  
Jose N. Perfetti
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Manganese Oxide ◽  
Clay Minerals ◽  
Iron Oxides ◽  
Theoretical Background ◽  
Thermal Study ◽  
The Past ◽  
Considerable Success ◽  
Oxide Minerals

In the past decade, differential thermal analysis has developed into a very useful mineralogical technique. The theoretical background for this method has been treated by Speil, Berkelhamer, Pask, and Da vies (1945) and has been modified by Kerr and Kulp (1948, 1949). The application of the method to the clay minerals has been carried out with considerable success by a number of workers in Europe and America. In particular, Grim and co-workers (1942, 1947, 1948) have produced a number of significant papers dealing with the thermal analysis of clays. The method has been extended to other mineral groups such as the carbonates (Faust, 1949; Beck, 1946; Kerr and Kulp, 1947; Cuthbert and Rowland, 1947; Kulp, Kent, and Kerr, 1950), phosphates (Manly, 1950), sulphates (Kulp and Adler, 1950), quartz (Faust, 1948), and the hydrous iron oxides (Kulp and Trites, 1950).

Some Comments on the Chemistry and Stability of Interstratified Illite-Smectite and the Role of Ostwald-Type Processes

Clay Minerals ◽  
1994 ◽  
Vol 29 (1) ◽  
pp. 63-68 ◽  
Author(s):  
T. J. Primmer
Keyword(s):  
Clay Minerals ◽  
Thermodynamic Data ◽  
Ostwald Ripening ◽  
Particle Theory ◽  
Fundamental Particle ◽  
Smectite Clay ◽  
The Relationship ◽  
Particle Thickness

AbstractMuch emphasis has been placed recently on the role of Ostwald-type processes (both ripening and the step rule) in the formation of interstratified illite-smectite clay minerals during diagenesis. Closer investigation of the relationships between illite particle thickness (as defined in terms of the fundamental particle theory) and particle chemistry show that simple Ostwald ripening is too simplistic a mechanism to describe observed changes in illite thickness and composition. In addition, available thermodynamic data on clay minerals suggest that the conventional notion of metastability associated with Ostwald's step rule is an inaccurate description of the relationship between illitic clay minerals and their macroscopic 2 : 1 phyllosilicate analogues.

INDICATION OF CESIUM ADSORPTION INTO ANGSTROM-SCALE OPEN SPACES IN SAPONITE CLAY MINERAL

2012 ◽  
Vol 11 (06) ◽  
pp. 1240034 ◽  
Author(s):  
KAZUOMI NUMATA ◽  
KIMINORI SATO ◽  
KOICHIRO FUJIMOTO
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Clay Minerals ◽  
Clay Mineral ◽  
Open Space ◽  
Vacuum Condition ◽  
Adsorption Behavior ◽  
Open Spaces

Adsorption behavior of cesium (Cs) into angstrom-scale open spaces for the saponite clay mineral is investigated by making use of positronium (Ps) annihilation spectroscopy together with thermogravimetry and differential thermal analysis (TG–DTA). Ps annihilation spectroscopy reveals two kinds of open spaces with their sizes of ~ 3 Å and ~ 10 Å, respectively, after baking at 423 K for 8 h under the vacuum condition at ~ 10-5 Torr. The large open space is found to survive for the Cs -type saponite due to less hydration of the Cs cations even after the exposure to the air for 200 h. It is thus inferred that Cs is locally adsorbed in the angstrom-scale open spaces in the saponite clay minerals.

scholarly journals Metal Oxide and Metal Complex Immobilization Modified Smectite Clay For Green Catalysis and Photo-Catalysis Applications: A Mini Review

2018 ◽  
Vol 3 (1) ◽  
pp. 54-59
Author(s):  
Is Fatimah
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Clay Minerals ◽  
Hydrogen Transfer ◽  
Physicochemical Characteristic ◽  
Characteristic Change ◽  
Smectite Clay ◽  
Factors Affecting ◽  
Photo Catalytic Activity ◽  
Green Catalysis

Clay minerals are promising modifiable material for catalysis application. Fit to green chemistry issue, green catalysis based on clay minerals modification has been designed in our research group. Metal oxide and metal complexes modification onto natural and synthetic smectite clay via pillarization and intercalation processes and its application as green catalyst have been investigated.  This paper presents the study on preparation of Ni, Zr and Pt  insertion on smectite clay structure for green conversion of citronellal to menthol via catalytic hydrogen transfer mechanism and Ru-complex modified smectite clay as novel photocatalysis application.  Effect of clay structure modification was also studied in order to investigate the  relationship between physicochemical characteristic change of material modifications and its catalytic/photo-catalytic activity. Some interesting phenomena related to the interaction of metal-clay support for their performance toward reaction kinetics and mechanism are reviewed, with emphasis on the evolution of surface properties and some factors affecting catalytic/photo-catalytic activity

Redox Properties of Structural Fe in Smectite Clay Minerals

2011 ◽  
pp. 361-379 ◽  
Author(s):  
Anke Neumann ◽  
Michael Sander ◽  
Thomas B. Hofstetter
Keyword(s):  
Clay Minerals ◽  
Redox Properties ◽  
Smectite Clay
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