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Multiple Episodes of Clay Alteration at the Precambrian/Paleozoic Unconformity, Appalachian Basin: Isotopic Evidence for Long-Distance and Local Fluid Migrations
Alteration Brines Chlorite Illite Isotopes Meteoric Water Precambrian Unconformity Ontario
2011/12/6
Abstract: Chlorite and illite are commonly associated with ubiquitous secondary K-rich feldspar in the rocks located immediately above and below the Precambrian-Paleozoic unconformity in southwestern ...
Full multiple scattering calculations of the X-ray absorption near edge structure at the magnesium K-edge in pyroxene
Full multiple scattering calculations X-ray absorption magnesium K-edge
2012/3/31
We present a comparison between XANES experiments and full multiple-scattering cal-culations at the magnesium K-edge for two pyroxenes, diopside and enstatite, for which Mg atoms are only in the M1 si...
The Influence of Uranyl Hydrolysis and Multiple Site-Binding Reactions on Adsorption of U(VI) to Montmorillonite
Montmorillonite Uranyl
2011/12/28
Adsorption of uranyl to SWy-1 montmorillonite was evaluated experimentally and results were modeled to identify likely surface complexation reactions responsible for removal of uranyl from solution. U...
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
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 of Two High-Mg and Two High-Fe Chlorites Using Multiple Equilibria
Chlorite Free energy of formation Iron Magnesium Solubility Stability
2012/2/7
High-Mg chlorites from Vermont and Quebec and high-Fe chlorites from Michigan and New Mexico were equilibrated at room temperature in the near-neutral pH range. Gibbsite, kaolinite, and hematite of kn...
Multiple-Ion Diffusion—I. Techniques for Measuring and Calculating Apparent Self-Diffusion Coefficients in Heteroionic Systems
Multiple Ion Diffusion I. Techniques Measuring Calculating Apparent Self-Diffusion Coefficients Heteroionic Systems
2012/2/21
This investigation was designed to integrate the quick-freeze technique for ion diffusion with two computer programs to permit the simultaneous measurement and calculation of the diffusivity of a vari...