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In recent years, we have seen a growing concern in the developed farming community towards a sustainable and more environmentally friendly agriculture. In parallel, soaring energy prices are directly ...
Abstract: Molecular dynamics computer simulations were used to study methanol molecules confined between the layers of 2:1 phyllosilicates. The model systems are based on natural Ca- and Na-rich montm...
Abstract: An environmental infrared microbalance (EIRM) cell was used to study H2O sorption on two montmorillonite samples as a function of water content and type of exchangeable cation. The vibration...
Diffusion of Ca and Mg in calcite     Diffusion  Ca  Mg  calcite       2012/4/1
The self-diffusion of Ca and the tracer diffusion of Mg in calcite have been measured experimen-Mg and Ca. Natural single crystals of calcite were coated with atally using isotopic tracers of gas at ...
Pyrope-grossular solid solutions, (Mg,Ca) Al Si O , of composition Py Gr and Py Gr were3 2 3 12 85 15 75 25 synthesized at 1000, 1200, and 1400 ?C and 30 kbars in a piston-cylinder device. The synt...
The Cl NMR spectroscopy of Cl -intercalated hydrotalcite and the Ca-aluminate hydrate, the presence of hydrocalumite (Friedel°Os salt) demonstrates dynamical behavior of interlayer C dynamical orde...
Burbankite, ideally (Na,Ca) (Sr,REE,Ba) (CO ) , is a rare REE carbonate mineral that until now had been encountered only at a few localities including highly alkaline silicate rocks, carbonatites, a...
Theequationsofstateof A2/a titanitephasesofCaTiSiO ,Ca(Ti Si )SiO ,andCaSi O5 0.5 0.5 5 2 5 havebeendeterminedfromhigh-pressureX-raydiffractionmeasurements.Theisothermal bulkmoduliare K 131.4(7)GPa(...
Abstract: Organoclays were prepared by exchanging Ca2+ in a Ca2+-saturated smectite partially or fully with trimethylphenylammonium (TMPA) cations. The mechanistic function of these organoclays as ads...
Abstracts: Swelling clays may play a major role in the underground disposal of high-level nuclear waste (HLW) in deep geological formations. A multibarrier concept including a waste container, a steel...
Synthetic Ca-exchanged birnessite (CaBi) was studied by X-ray and selected-area elec-tron diffraction (XRD, SAED). The substructure of CaBi may be described with a four-layer monoclinic subcell with a...
Abstract: Rectorites containing various amounts of Ca were found at the Sano Mine, Nagano Prefecture, Japan. The Ca content in nonexchangeable form varied from 1.0 to 3.9% CaO. With more than 3.4%, th...
TheintracrystallinedistributionofMgandFe ontheM1andM2octahedralsitesinhigh-PC2/c (Mg,Fe)SiOclinopyroxenehasbeendeterminedonquenchedsamplesusing FeMo!§ssbauerspectroscopy.Althoughtherecoveredsamplesth...
edimentsofplayaLakeSalines,SE,Spain,containacarbonatemineralcharacterizedbyXraydiffractionpeaksverysimilarto,butsystematicallyshiftedfromthoseofpuremagnesite.Analyses(SEM,IRandRamanspectroscopy,DTA,TG...
Abstract: Because of the large surface area and common occurrence of smectites in the clay fractions, they are important in sorption/desorption reactions of organic pollutants entering soils and sedim...

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