搜索结果: 1-15 共查到“理学 Beidellite”相关记录19条 . 查询时间(0.044 秒)
Synthesis and characterisation of organo-beidellite
Synthesis characterisation organo-beidellite
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2012/3/30
Today, there are growing concerns about the presence of environmental pollutants in many parts of the world. In particular, a lot of attention has been drawn to the levels of water and soil contaminan...
Compositional Gap in Dioctahedral-Trioctahedral Smectite System: Beidellite-Saponite Pseudo-Binary Join
Beidellite-Saponite Join Compositional Gap Hydrothermal Experiment Mixed-Layer Phases
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2011/12/8
Abstract: A series of hydrothermal experiments were performed to determine the phase relations on the beidellite-saponite pseudo-binary join. Quenched glasses with stoichiometric dehydrated compositio...
Fe3+-Rich Montmorillonite-Beidellite Series in Ayvacik Bentonite Deposit, Biga Peninsula, Northwest Turkey
Biga Peninsula Fe-rich Beidellite Montmorillonite Turkey
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2011/12/6
Abstract: The Ayvac齥 bentonites, products of Miocene calc-alkaline volcanic rocks, are composed of smectite of the montmorillonite-beidellite series. Fault-related hydrothermal solutions have altered ...
Pedogenic Formation of High-Charge Beidellite in a Vertisol of Sardinia (Italy)
Beidellite High-charge Smectite Layers Illite-Smectite Mixed Layers Italy Smectite Soil Vertisol
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2011/12/8
Abstract: The fine clay (<0.1 祄) fraction of a clayey soil (Vertisol) from Sardinia (Italy) was studied by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, cation exch...
Gallium and Chromium Substitution for Aluminum in Synthesized Beidellite
Beidellite Synthesis Chromium Gallium Isomorphous Substitution
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2011/12/8
Abstract: The hydrothermal synthesis of Mg-beidellite in which limited amounts of Ga and Cr are clearly shown to be incorporated into nonexchangeable positions in the clay layer framework is reported ...
Beidellite and Associated Clays from the DeLamar Mine and Florida Mountain Area, Idaho
Beidellite Clay Chemistry Differential Thermal Analysis Illite-Beidellite Rectorite X-ray Powder Diffraction
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2011/12/9
Abstract: There has been much interest in the rare specimen of beidellite from the Black Jack Mine, Florida Mountain, Idaho. A variety of aluminous clays exists along veins such as the Black Jack vein...
Beidellite in E Horizons of Northern Idaho Spodosols Formed in Volcanic Ash
Northern Idaho Podzolization Smectite Soil genesis Tephra
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2011/12/28
While soils formed in tephra are typically dominated by poorly crystalline clay minerals, the occurrence of smectite in E horizons of podzolized soils (Spodosols) has been well-documented. We have obs...
Low-Charge to High-Charge Beidellite Conversion in a Vertisol from South Italy
Beidellite Smectites Vertisol
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2011/12/28
The fine silt (2? 祄) coarse clay (0.1? 祄) and fine clay (<0.1 祄) fractions of a Vertisol from South Italy were studied with X-ray diffraction. The most reactive fine clay (<0.1 祄) fraction was investi...
Kaolinite/Montmorillonite Resembles Beidellite
Beidellite Greene-Kelly test Kaolinite/montmorillonite
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2011/12/29
A number of smectitic samples from Almería (SE Spain) were studied by chemical analysis, DTA, TG, XRD (oriented aggregates with ethylene glycol treatment and Greene-Kelly test), FTIR and MAS NMR. Chem...
Isothermal Treatments of Regularly Interstratified Montmorillonite-Beidellite at Hydrothermal Conditions
Hydrothermal condition Isothermal treatments Regularly stratified montmorillonite-beidellite
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2011/12/30
A glass in the intermediate composition of montmorillonite and beidellite, 50/50 in mole ratio, was treated under a hydrothermal pressure of 100 MPa, in the temperature range from 250 to 500°C and dur...
Some Colloidal Properties of Beidellite: Comparison with Low and High Charge Montmorillonites
Beidellite Charge location Coagulation Poly(vinyl) alcohol Surface charge density
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2011/12/30
Recent evidence of the occurrence of beidellite in many soils around the world necessitates a better understanding of the role of charge location on the colloidal behavior of this smectite as compared...
Synthesis and Paragenesis of Na-Beidellite as a Function of Temperature, Water Pressure, and Sodium Activity
Beidellite Electron microprobe Hydrothermal synthesis Kaolinite Paragonite Pyrophyllite Scanning electron microscopy X-ray diffraction
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2011/12/30
In the chemical system Na2O-Al2O3-SiO2-H2O, the stability field of Na-beidellite is presented as a function of pressure, temperature, and Na- and Si-activity. Na0.7-beidellite was hydrothermally synth...
Formation of Allophane and Beidellite During Hydrothermal Alteration of Volcanic Glass Below 200°C
Allophane Amorphous aluminum-silicate coating Experimental alteration Smectite Transitional material Volcanic glass
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2011/12/31
Experimental alteration of volcanic glass has been carried out in distilled water at 200°C and 150°C. The formation and transformation processes of alteration products have been examined by scanning e...
The Interlayer Collapse during Dehydration of Synthetic Na0.7-Beidellite: A 23Na Solid-State Magic-Angle Spinning NMR Study
Beidellite Dehydration Interlayer collapse 23Na MAS-NMR
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2011/12/31
The dehydration and migration of the interlayer cation of the synthetic beidellite Na0.7Al4.7Si7.3O20-(OH)4·nH2O, were studied with solid-state 23Na and 27Al MAS-NMR, heating stage XRD, and thermograv...
X-ray Powder Diffraction Studies on the Rehydration Properties of Beidellite
Beidellite Cation migration Dehydration Fourier analysis Interlayer ration Rehydration X-ray powder diffraction
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2011/11/30
Abstract: The rehydration properties of Ca-, Mg-, Na-, and K-saturated homoionic beidellites after heating at various temperatures were compared with those of montmorillonites. The behavior of interla...