搜索结果: 16-30 共查到“凹凸棒石 Vermiculite”相关记录76条 . 查询时间(0.312 秒)
Interaction of Vermiculite with Aliphatic Amides (Formamide, Acetamide and Propionamide): Formation and Study of Interstratified Phases in the Transformation of Mg- to Nh4-Vermiculite
Aliphatic Amides Fourier Analysis Interaction Interstratification Ion Exchange Sorption Mechanism Vermiculite
2011/12/22
Abstract: The Mg-vermiculite from Santa Olalla has been treated with aliphatic amides—formamide (FM), acetamide (AM) and propionamide (PM)—in aqueous solution. These treatments produce the transformat...
Evolution of Benzylammonium-Vermiculite and Ornithine-Vermiculite Intercalates
Benzylammonium Intercalate IR NIR Order-disorder Ornithine Stacking order Vermiculite X-ray
2011/12/1
Abstract: This report consists of a study of l-ornithine hydrochloride-vermiculite and of benzylammonium hydrochloride-vermiculite complex. The evolution of these organo-vermiculite structures upon he...
Transition Metals in Llano Vermiculite Samples: an EPR Study
Carbonates Cw and Pulsed Electron Paramagnetic Resonance Spectroscopies Phase Transformation Vermiculite
2011/12/27
Abstract: Continuous wave and pulsed electron paramagnetic resonance spectroscopies combined with thermal and chemical methods were used to identify and characterize V(IV), Fe(III), Mn(II) and Cr(III)...
The Sol Concentration Effect in n-Butylammonium Vermiculite Swelling
CAT DLVO theory Neutron diffraction Osmotic swelling Phase transitions Salt fractionation Trapped salt Vermiculite gels
2011/12/29
The swelling of n-butylammonium vermiculite in water was investigated as a function of the sol concentration (r), the salt concentration (c) and the temperature (T).The interlayer spacing in the gel p...
Stacking Order in a K/Mg Interstratified Vermiculite from Malawi
Crystal structure Interstratification Ion exchange Ordering Stacking Vermiculite
2011/12/30
The stacking order of a bi-ionic K/Mg vermiculite from Malawi (Nyasaland), has been determined from Weissenberg data. The sample corresponds to a K/Mg interstratified vermiculite containing 50% K laye...
Characterization of Hydroxy-Interlayered Vermiculite and Illite/Smectite Interstratified Minerals from the Weathering of Chlorite in a Cryorthod
Chlorite Hydroxy-interlayered intergrades Illite/smectite mixed-layers Soil clays Spodosol
2011/12/30
X-ray diffraction, FTIR, and chemical analyses were performed on clay fractions (1? 祄, <0.1 祄), separated by means of size fractionations and high-gradient magnetic separation techniques, from a Cryor...
Occluded Mica in Hydroxy-Interlayered Vermiculite Grains from a Highly-Weathered Soil
Electron microprobe High-resolution transmission electron microscopy Mica transformation Vermiculite
2011/12/1
Abstract: Hydroxy-interlayered vermiculite (HIV) is a ubiquitous phyllosilicate in the <0.05-mm fraction of sandy soils on the U.S. southeastern coastal plain. Extensive areas of soils with abundant H...
Saponite and Vermiculite in Amygdales of the Granby Basaltic Tuff, Connecticut Valley
Amygdales Basalt Fe-rich smectite Saponite Saponite-vermiculite intermediate Smectite Vermiculite
2011/11/30
Abstract: Clay of apparent hydrothermal origin that fills amygdales in the Granby Basaltic Tuff (Lower Jurassic) of the Connecticut Valley was analyzed and found to consist of two exceptionally well-c...
Dehydration of Hydroxy-Interlayered Vermiculite as a Function of Time and Temperature
Dehydroxylation Hydration X-ray diffraction
2011/12/31
Nonexchangeable polymers in interlayers of expansible phyllosilicates influence thermal dehydration in ways not completely understood. Thermal dehydration of hydroxy-interlayered vermiculite (HIV) fro...
Electric Charge and Surface Characteristics of Hydroxyaluminosilicate- and Hydroxyaluminum-Vermiculite Complexes
Electric charge characteristics Fixation Hydroxy-Al Hydroxyaluminosilicate Specific surface area Vermiculite
2011/12/31
Hydroxyaluminosilicate (HAS) ions prepared from hydroxy-Al (HyA) ions and orthosilicic acid at different NaOH/Al molar and Si/Al atomic ratios were fixed in the interlayer spaces of vermiculite (Vt). ...
Detection of Tetrahedral Fe3+ Sites in Nontronite and Vermiculite by M鰏sbauer Spectroscopy
Dehydration Isomorphic substitution Mossbauer spectroscopy Nontronite Tetrahedral iron Vermiculite
2012/1/4
Mossbauer spectra were obtained for five Ca-exchanged nontronites and one Ca-exchanged vermiculite as the 2-layer hydrates following dehydration at 200癈. Exchange of the samples with Ca2+ and subseque...
乬Dealumination乭 and Aluminum Intercalation of Vermiculite
Aluminum Cation-exchange capacity Dealumination Intercalation Nuclear magnetic resonance Vermiculite
2011/12/31
Dealumination of vermiculite was carried out using (NH4)2SiF6 solutions. The dealuminated products were studied by high-resolution solid state 29Si and 27Al nuclear magnetic resonance. A decrease in t...
Dehydration and Rehydration of Saponite and Vermiculite
Cation migration Dehydration Hydration energy Interlayer cations Rehydration Saponite Vermiculite
2011/12/31
The rehydration properties and behavior of interlayer cations of Ca-, Mg-, Na-, and K-saturated homoionic saponite and vermiculite heated at various temperatures were examined and their rehydration me...
Swelling of n-Butylammonium Vermiculite in Water
DLVO theory n-Butylammonium chloride Neutron diffraction Swelling Vermiculite
2011/11/30
Abstract: The swelling of an n-butylammonium vermiculite in solutions of n-butylammonium chloride has been studied by neutron diffraction as a function of temperature and the concentration of the soak...
Interstratification in Malawi Vermiculite: Effect of Bi-Ionic K-Mg Solutions
Interstratification Ion exchange Magnesium Potassium Vermiculite X-ray powder diffraction
2012/1/5
The conversion of Malawi vermiculite into K-vermiculite by treatment with bi-ionic K-Mg solutions of 1 N total ion concentration (KCl and MgCl2 mixed solutions of ionic strength equal to 0.5) was stud...