搜索结果: 16-26 共查到“地质学 measurements”相关记录26条 . 查询时间(0.125 秒)
Direct oxygen measurements of Cr-rich spinel: Implications for spinel stoichiometry
Direct oxygen measurements Cr-rich spinel Implications spinel stoichiometry
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2012/4/6
Theavailability ofa synthetic multilayercrystal and accurately calibrated oxide and silicate standards makeit possible to usethe electron microprobefor precisea analysis ofspinel. Arequirement ofthe a...
Intercalation of Tetraalkylammonium Cations into Smectites and its Application to Internal Surface Area Measurements
Hectorite Intercalation Internal surface area Montmorillonite Quaternary ammonium cations Smectite Tetraalkylammonium cations
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2011/12/1
Abstract: Monolayer to bilayer (MTB) and bilayer to pseudotrimolecular (BTP) transitions were observed for smectites exchanged with symmetrical tetraalkylammonium cations of increasing sizes: +NR4, wh...
Surface Free Energy Components of Clay-Synthetic Humic Acid Complexes from Contact-Angle Measurements
Adsorption Aggregate stability Humic acid Montmoriltonite Surface free energy Wettability
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2011/11/30
Abstract: The surface free energy components of clay-organic complexes were determined to assess to what extent an organic adsorbate modified the surface properties of the mineral, insofar as the stab...
Compaction and Swelling of Ca-Smectite in Water and in CaCl2 Solutions: Water Activity Measurements and Matrix Resistance to Compaction
Calcium chloride Compaction Matrix resistance Rheology Smectite Swelling Water activity
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2011/11/30
Abstract: Direct water-activity measurements were made for calcium-smectite-CaCl2 mixtures. The samples used were prepared by high-pressure filtration and had water contents <0.60% by weight of clay. ...
Study of Some Physicochemical Properties of Pillared Montmorillonites: Acid-Base Potentiometric Titrations and Electrophoretic Measurements
Electrophoretic mobility Montmorillonite Pillared clays Potentiometric titration Surface charge
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2012/1/4
The surface charges and the zeta potential of a Na-montmorillonite (Na-mont) and two pillared montmorillonite (MP1 and MP2) samples with different aluminum contents were determined by potentiometric t...
Oxygen Isotope Measurements of Albite-Quartz-Zeolite Mineral Assemblages, Hokonui Hills, Southland, New Zealand
Albite Diagenesis Formation temperature Heulandite Laumontite Oxygen isotopes Quartz Stilbite Zeolites
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2012/1/6
The oxygen isotopes of albite, quartz, and zeolites from the Hokonui Hills, New Zealand, constrain crystallization temperatures and the type of pore fluids present during diagenesis. A section of alte...
Fourier-Transform Infrared Study of Ethylene Glycol Monoethyl Ether Adsorbed on Montmorillonite: Implications for Surface Area Measurements of Clays
Adsorption Attenuated total reflectance spectroscopy Ethylene glycol monoethyl ether Infrared spectroscopy Molecular configuration Montmorillonite
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2011/11/25
Abstract: Infrared spectra of 2-ethoxyethanol (ethylene glycol monoethyl ether, EGME) adsorbed on Camontmorillonite were obtained using diffuse-reflectance infrared-Fourier-transform (DRIFT) and atten...
Multiple Cation-Exchange Capacity Measurements on Standard Clays Using a Commercial Mechanical Extractor
Apparatus Cation-exchange capacity Ion-exchange method K-fixation Leaching tube 2:1 clay minerals
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2011/11/25
Abstract: Sequential cation-exchange capacity (CEC) measurements were obtained from standard clays using a mechanized, variable-rate leaching device. The device consists of a motorized screwjack and a...
Solubility Measurements of Phases in Three Illites
Equilibration Illite Kaolinite Phase analysis Pyrophyllite Solubility
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2012/2/2
Goose Lake, Beavers Bend, and Fithian illites were equilibrated in the presence of goethite (or hematite) at room temperature for as long as 2.6 yr. Kaolinite of known stability was added to some samp...
Surface Potentials Derived from Co-Ion Exclusion Measurements on Homoionic Montmorillonite and Illite
Co-ion exclusion Double-layer potential Illite Montmorillonite Surface charge
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2012/2/3
Simple equations are presented which allow double-layer potentials of clays to be derived from co-ion exclusion measurements in monovalent and divalent electrolyte solutions. These equations have been...
Free Energy of Formation of Beidellite from Apparent Solubility Measurements
Free Energy Formation of Beidellite Apparent Solubility Measurements
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2012/2/13
The structural formula for K and Mg saturated beidellite was calculated from the total elemental analysis of the <0.2 ?clay fraction of the B2t horizon of a Mexico soil. The free energies of formation...