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PRETREATMENT OF SOILS AND CLAYS FOR MEASUREMENT OF EXTERNAL SURFACE AREA BY GLYCEROL RETENTION
SOILS CLAYS GLYCEROL RETENTION
2011/11/15
Heat treatment at 600~ has been the usual procedure for irreversible collapse of expanding clay minerals prior to determination of the external surface area of clays and soils by glycerol retention. E...
Quantitative Measurement of Paramagnetic Fe3+ in Kaolinite
Electron Paramagnetic Resonance EPR Fe3+ Kaolinite
2011/12/6
Abstract: A method is proposed to measure the absolute concentration of paramagnetic Fe3+ ions in kaolinite from various geochemical environments using powder X-band electron paramagnetic resonance (E...
Measurement of Fundamental Illite Particle Thicknesses by X-ray Diffraction Using PVP-10 Intercalation
Bertaut Fundamental Illite Particles Illite Illite-Smectite Mixed-Layering Peak Broadening Polyvinylpyrrolidone Warren-Averbach X-ray Diffraction
2011/12/2
Abstract: The thicknesses of fundamental illite particles that compose mixed-layer illite-smectite (I-S) crystals can be measured by X-ray diffraction (XRD) peak broadening techniques (Bertaut-Warren-...
XRD Measurement of Mean Thickness, Thickness Distribution and Strain for Illite and Illite-Smectite Crystallites by the Bertaut-Warren-Averbach Technique
Crystallite Fundamental Illite Particles Illite Illite-Smectite MacEwan Crystallites Mixed-Layer Clay Thickness Distributions Warren-Averbach Method
2011/12/2
Abstract: A modified version of the Bertaut-Warren-Averbach (BWA) technique (Bertaut 1949, 1950; Warren and Averbach 1950) has been developed to measure coherent scattering domain (CSD) sizes and stra...
Quantitative measurement of short compositional profiles using analytical transmission electron microscopy
Quantitative measurement transmission electron microscopy
2012/3/31
Analytical transmission electron microscopy (ATEM) was used to quantitatively measure sub-micrometer compositional profiles produced experimentally by Fe-Mg interdiffusion experiments in olivine. Alth...
Equation of state of brucite: Single-crystal Brillouin spectroscopy study and polycrystalline pressure-volume-temperature measurement
Single-crystal Brillouin spectroscopy polycrystalline pressure-volume-temperature measurement
2012/3/30
Acoustic velocities of brucite were measured at room pressure in over 48 directions from Brillouin spectroscopy using a natural sample. These data are supplemented with volume measurements as a functi...
Calorimetric Measurement of the Enthalpy of Hydration of Clinoptilolite
Calorimetry Clinoptilolite Energetics Enthalpy Hydration Zeolite
2011/12/22
Abstract: The enthalpy of hydration of natural clinoptilolite was determined by isothermal immersion calorimetry on Ca-, Na- and K-exchanged clinoptilolite (Fish Creek Mountains, Nevada). Heats of imm...
XRD Measurement of Mean Crystallite Thickness of Illite and Illite/Smectite: Reappraisal of the Kubler Index and the Scherrer Equation
Crystal Thickness Illite Illite/Smectite Kubler Index Mixed-Layer Crystals Scherrer Equation XRD
2011/12/22
Abstract: The standard form of the Scherrer equation, which has been used to calculate the mean thickness of the coherent scattering domain (CSD) of illite crystals from X-ray diffraction (XRD) full w...
Magnesium site exchange in forsterite: A direct measurement by high-temperature 25Mg NMR spectroscopy
Magnesium site forsterite measurement high-temperature 25Mg NMR spectroscopy
2012/4/9
High-resolution 25MgNMR data are reported for a single crystal of pure forsterite (Mg2Si04) at temperatures to about 1400°C, which allow rates of exchange ofMgcations among specific sites in the struc...
Porosimetry Measurement of Shale Fabric and its Relationship to Illite/Smectite Diagenesis
Illite/Smectite Shale fabric Mercury porosimetry
2011/12/31
The extent of illite/smectite (I/S) reactions is linked with quantitative measurements of shale fabric in a suite of samples from a lower Frio Formation well. Greater illitization of the I/S clays is ...
Direct High-Resolution Transmission Electron Microscopic Measurement of Expandability of Mixed-Layer Illite/Smectite in Bentonite Rock
Expandability Fundamental particle High-resolution transmission electron microscopy Illite/smectite Interstratification
2012/1/4
Samples of mixed-layer illite/smectite were investigated from a single bentonite bed zoned with respect to expandability from 90 to 30%. Chips of natural rocks were embedded in a resin, using procedur...
Measurement of the Specific Surface Area of Clays by Internal Reflectance Spectroscopy
Ethylene glycol monoethyl ether Infrared spectroscopy Internal reflectance spectroscopy Molar absorptivity Montmorillonite Surface area
2012/2/2
The specific surface area, S, of a clay is commonly measured by the adsorption of ethylene glycol monoethyl ether (EGME); however, this method can be tedious and time consuming, especially if the clay...
Direct Measurement of the Relation Between Swelling Pressure and Interlayer Distance in Li-Vermiculite
Double-layer theory Interlayer distance Swelling pressure Vermiculite X-ray diffraction
2012/2/1
To test the double-layer theory of swelling as applied to layer silicates, the interlayer separation, ? in a Li-saturated vermiculite from Grouse Creek, Utah, was measured as a function of the swellin...
Measurement of Exchangeable Cations in Bentonites
Measurement Exchangeable Cations Bentonites
2012/2/21
High swelling bentonites cannot be analyzed for exchangeable cations with exactly the same technique as most soils. To resolve varied techniques used in the past and to establish a reliable procedure,...
Electrokinetic Effects in Kaolin-Water Systems. I. The Measurement of Electrophoretic Mobility
Electrokinetic Effects Electrophoretic Mobility
2011/11/16
A new apparatus for the measurement of eleetrophoretie mobilities of particles in concentrated suspensions has been developed. The usual techniques for the study of electrophoretic mobility, such as t...