搜索结果: 91-105 共查到“凹凸棒石 Formation”相关记录146条 . 查询时间(0.184 秒)
Alcohothermal Treatments of Gibbsite: Mechanisms for the Formation of Boehmite
Alcohol x-Alumina Boehmite Crystallization Gibbsite Thermal treatment
2011/11/30
Abstract: Gibbsite samples of various particle sizes (0.2?0 祄) were heated at 250癈 in a series of straight-chain primary alcohols under the autogenous vapor pressure of the alcohol (alcohothermal trea...
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...
Influence of Mn2+ and pH on the Formation of Iron Oxides from Ferrous Chloride and Ferrous Sulfate Solutions
Goethite Infrared spectroscopy Iron oxides Lepidocrocite Maghemite Manganese Synthesis X-ray powder diffraction
2012/1/6
The influence of Mn2+ on the formation of Fe oxides at pHs of 6.0 and 8.0 and varying Mn/Fe molar ratios (0, 0.1, 1.0, and 10.0) in the FeCl2-NH4OH and FeSO4-NH4OH systems was studied by X-ray powder ...
Clay Mineral Segregation by Flocculation in the Porters Creek Formation
Flocculation Illite Kaolinite Sedimentation Smectite
2012/1/5
The Porters Creek Formation is mined as an absorbent clay in Illinois, Mississippi, Missouri, and Tennessee. The absorptive properties of the Porters Creek Formation are due to the high content of sme...
Microstructures, Formation Mechanisms, and Depth-Zoning of Phyllosilicates in Geothermally Altered Shales, Salton Sea, California
Chlorite Electron microscopy Fluid-mineral equilibria Geothermal field Illite Salton Sea Smectite Texture
2011/11/28
Abstract: Scanning, transmission, and analytical electron microscopy studies of shales from the Salton Sea geothermal field revealed that phyllosilicates progress through zones of illite-muscovite (11...
Reactions of Polynuclear Hydroxyaluminum Cations with Montmorillonite and the Formation of A 28-A Pillared Complex
Fourier transform Hydroxy-Al Montmorillonite Pillared interlayer complex Thermal stability
2012/1/9
Polynuclear hydroxy-Al cations were prepared by partially neutralizing dilute solutions of aluminum chloride. These cations were introduced in the interlayer space of montmorillonite by cation exchang...
Influence of Manganese Oxide Minerals on the Formation of Iron Oxides
Akaganeite Cryptomelane Feroxyhyte Hausmannite Iron oxides Manganese Oxidation-reduction Pyrolusite Synthesis
2012/1/10
The influence of manganese oxide minerals (cryptomelane, hausmannite, and pyrolusite) on the formation of iron oxides was studied in the FeCl2-NH4OH system at different Mn/Fe molar ratios (0, 0.01, 0....
Evidence for the Formation of Interlayer Polyacrylonitrile in Kaolinite
Ammonium acetate Infrared spectroscopy Intercalation Kaolinite Polyacrylonitrile Polymerization X-ray powder diffraction
2012/1/9
A kaolinite-polymer intercalation complex was apparently formed for the first time by the polymerization of acrylonitrile between the kaolinite layers. A kaolinite-ammonium acetate intercalation compl...
Authigenic Chrysotile Formation in the Matrix of Quaternary Debris Flows, Northern Southland, New Zealand
Authigenesis Chrysotile Debris flow Pseudoboehmite Serpentine
2011/11/25
Abstract: Quaternary debris flows derived from ophiolite melange in northern Southland, New Zealand, are locally cemented and veined by cross-fiber and fine-grained chrysotile. Chrysotile was identifi...
Weathering of Basalt: Formation of Iddingsite
Goethite Iddingsite Iron Olivine Scanning electron microscopy Transmission electron microscopy Weathering
2012/1/11
The formation of iddingsite by the oxidative weathering of Fo80 olivine begins by solution of Mg from planar fissures, 20 Å wide and spaced 200 Å apart, parallel to (001). Oxidation of Fe ...
Properties of Iron Oxides in Two Finnish Lakes in Relation to the Environment of Their Formation
Al-substitution Ferrihydrite Genesis Goethite Iron oxide Lake environment
2012/1/11
Fifteen iron oxide accumulations from the bottoms of two Finnish lakes (搇ake ores? were found to contain as much as 50% Fe. Differential X-ray powder diffraction and selective dissolution by oxalate s...
Factors that Govern the Formation of Multi-domainic Goethites
Domains Goethite Intergrowths Iron Synthesis Transmission electron microscopy
2012/1/12
Transmission electron microscopic (TEM) examination has shown that multi-domainic crystals of synthetic goethite consist of almost parallel intergrowths, each of which is slightly misoriented with res...
Effect of Ion-Pair Formation on Boron Adsorption by Kaolinite
Adsorption Boron Ion pair Ion speciation Kaolinite
2012/2/2
Boron adsorption on 2-0.2-祄 size fractions of kaolinite at 25??2癈 at pH values between 6.0 and 10.5 was studied. The kaolinite sample was pretreated to remove any surface oxide and hydroxide coatings....
Mineralogical and Morphological Evidence for the Formation of Illite at the Expense of Illite/Smectite
Diagenesis Illite Illite/smectite Morphology Scanning electron microscopy X-ray powder diffraction
2012/2/1
The conversion of smectite to illite by way of a mixed-layer illite/smectite (I/S) series was found to be the major depth-related reaction in clay-mineral assemblages from two cored sedimentary sequen...
Influence of Citric Acid on the Formation of Short-Range Ordered Aluminosilicates
Allophane Aluminosilicate Citric acid Hydroxy-Al Imogolite Noncrystalline Pseudoboehmite
2012/2/2
Reactions between hydroxy-Al ions and orthosilicic acid as influenced by citric acid were studied at an initial Si concentration of 1.6 ?10−3 M, Si/Al molar ratios of 0.5 and 1.0, OH/Al molar ra...