搜索结果: 1-15 共查到“凹凸棒石 crystalline”相关记录16条 . 查询时间(0.078 秒)
Bacterial reduction of crystalline Fe3+ oxides in single phase suspensions and subsurface materials
Bacterial reduction crystalline Fe3+ oxides single phase suspensions subsurface materials
2012/4/1
Microbiologic reduction of synthetic and geologic Fe31 oxides associated with four Pleis-tocene-age, Atlantic coastal plain sediments was investigated using a dissimilatory Fe reducing bacterium ( She...
Relationship Between Cation Exchange Selectivity and Crystalline Swelling in Expanding 2:1 Phyllosilicates
Cation Exchange Selectivity Crystalline Swelling Demixing Fixation Ion Exchange Hysteresis Layer Charge Smectite
2011/12/22
Abstract: A theoretical model describing the interaction between crystalline swelling and cation exchange selectivity is proposed for expanding 2:1 phyllosilicates. The model is based on the assumptio...
Electron irradiation-induced phase segregation in crystalline and amorphous apatite: A TEM study
Electron irradiation-induced phase segregation crystalline amorphous apatite A TEM study
2012/4/6
SinglecrystalsofnaturalF-richapatiteand800keVKr ion-beam¤Camorphizedapatit
wereirradiatedbyanelectronbeaminatransmissionelectronmicroscopeoverarange
ofbeamenergiesandbeamcurrents.Irradiationofcrysta...
Multi-site order-disorder kinetics in crystalline solids: A generalized formulation
Multi-site order-disorder kinetics crystalline solids generalized formulation
2012/4/5
Manycrystallinesolidshavemultiplenonequivalentsitesamongwhichdifferentatoms
showsubstitutionallong-rangeorder-disorderphenomena.Theorder-disorderkineticsof
anatomamongany n nonequivalentsitesinacrys...
Volumes of K-Na mixing for low albite-microcline crystalline solutions at elevated temperature: A test of regular solution thermodynamic models
K-Na mixing low albite-microcline crystalline solutions elevated temperature test regular solution thermodynamic models
2012/4/1
High-temperature volumes of K-Na mixing have been investigated for a seven-member
low albite-microcline ion-exchange series by conducting X-ray powder diffraction mea-
surements from room temperatur...
Model for Crystalline Swelling of 2:1 Phyllosilicates
Crystalline Swelling 2:1 Phyllosilicates
2011/12/27
A macroscopic energy balance model for crystalline swelling of 2:1 phyllosilicates is presented. Crystalline swelling for a static system is modeled by a balance among the potential energies of attrac...
Crystalline Swelling of Smectite Samples in Concentrated NaCl Solutions in Relation to Layer Charge
Electrolyte Layer charge Smectite Swelling Vapor pressure X-ray powder diffraction
2011/12/31
The basal spacing of a set of smectites, with layer charges between 0.74 and 1.14 electrons per unit cell, have been measured while the smectites were in equilibrium with NaCl solutions having concent...
Kinetics of Dissolution of Noncrystalline Oxides and Crystalline Clay Minerals in a Basic Tiron Solution
Chlorite Dissolution Kaolinite Montmorillonite Noncrystalline Sepiolite Tiron solution
2012/1/4
The dissolution behavior of five noncrystalline oxides, montmorillonite, kaolinite, chlorite, and sepiolite in a basic tiron solution was studied at pH 10.5 and 80°C. The results show that for montmor...
Effect of Cobalt on the Formation of Crystalline Iron Oxides from Ferrihydrite in Alkaline Media
Cobalt Crystal growth Ferrihydrite Goethite Spinel Transmission electron microscopy
2011/11/30
Abstract: At pH 12 Co-ferrihydrite transformed to either Co-goethite or Co-magnetite, the latter compound appearing at Co additions of > 18 mole %. Although Co was readily taken up by the magnetite st...
Infrared Study of Structural OH in Kaolinite, Dickite, Nacrite, and Poorly Crystalline Kaolinite at 5 to 600 K
Crystallinity Dickite Infrared spectroscopy Kaolinite Nacrite X-ray powder diffraction
2012/1/6
The resolution of the infrared spectra of structural OH in kaolin-group minerals increases with decreasing temperature. Poorly crystalline kaolinite gives typical infrared spectra, which suggest the e...
Quantification of Crystalline and Noncrystalline Material in Ground Kaolinite by X-ray Powder Diffraction, Infrared, Solid-State Nuclear Magnetic Resonance, and Chemical-Dissolution Analyses
Chemical dissolution Dry grinding Infrared spectroscopy Kaolinite Noncrystalline Nuclear magnetic resonance X-ray powder diffraction
2012/1/5
The capabilities of X-ray powder diffraction (XRD), infrared absorption (IR), solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR), and chemical dissolution methods were assessed for ...
Chemical Weathering of Crystalline Rocks in the Catchment Area of Acidic Ticino Lakes, Switzerland
Acid precipitation Aluminum hydroxide Gneiss Iron hydroxide Weathering
2012/1/10
Atmospheric acidic deposition introduces hydrogen ions to terrestrial and aquatic ecosystems, which become partially neutralized by chemical weathering. In the southern Alps of Switzerland, small catc...
Synthesis and Properties of Poorly Crystalline Hydrated Aluminous Goethites
Aluminum Diaspore Goethite Infrared Synthesis Vegard's law X-ray powder diffraction
2012/2/8
Al-substituted goethites were prepared by rapid oxidation of mixed FeCl2-AlCl3 solutions at pH 6.8 in the presence of CO2 at 25亱C. A combination of Al substitution and adsorption of CO2 reduced crysta...
Amorphous and Crystalline Titanium and Iron-Titanium Oxides in Synthetic Preparations, at near Ambient Conditions, and in Soil Clays
Anatase Goethite Hematite Iron Pseudorutile Synthesis Titanium
2012/2/10
A series of mixed iron and titanium oxide coprecipitates ranging in composition between 0 < Ti/Ti + Fe < 1 was synthesized and aged under varying conditions of pH, temperature and time in order to est...
Properties and Quantitative Estimation of Poorly Crystalline Components in Sesquioxidic Soil Clays
Quantitative Estimation Poorly Crystalline Components Sesquioxidic soil clays
2012/2/13
Sesquioxidic soil clays from Oxisols in South Africa, Australia and Brazil, and two clays from Andosols in Japan and New Zealand, were investigated by selective dissolution techniques. Acid ammonium o...