搜索结果: 1-12 共查到“理学 Dehydroxylation”相关记录12条 . 查询时间(0.256 秒)
Spectroscopic study of the dehydration and/or dehydroxylation of phyllosilicate and zeolite minerals
phyllosilicate zeolite minerals spectroscopic
2011/11/8
Phyllosilicates on Mars mapped by infrared spectroscopic techniques could have been affected by dehydration and/or dehydroxylation associated with chemical weathering in hyperarid conditions, volcanis...
Structural Transformation of 2:1 Dioctahedral Layer Silicates during Dehydroxylation-Rehydroxylation Reactions
Cation Migration Celadonite Cis-Vacant Octahedra Dehydroxylation Glauconite Illite Rehydroxylation Smectites Structure Trans-Vacant Octahedra
2011/12/6
Abstract: The structural transformation of dioctahedral 2:1 layer silicates (illite, montmorillonite, glauconite, and celadonite) during a dehydoxylation-rehydroxylation process has been studied by X-...
Dehydroxylation Behavior of Heat-Treated and Steam-Treated Homoionic Cis-Vacant Montmorillonites
Celadonite Cis-Vacant Octahedra Dehydroxylation Homoionic Montmorillonite Mass Spectrometry Rehydroxylation Thermogravimetry Trans-Vacant Octahedra
2011/12/7
Abstract: Li+, Na+, Ca2+, Sr2+, Cu2+, or Zn2+-saturated samples of a cis-vacant montmorillonite from Linden, Bavaria, were heated to temperatures between 200–700°C. Half of each heated sample was subs...
Distinguishing between Surface and Bulk Dehydration-Dehydroxylation Reactions in Synthetic Goethites by High-Resolution Thermogravimetric Analysis
Crystallinity Dehydroxylation Goethite Thermogravimetry Nonstoichiometric Water TEM XRD
2011/12/7
Abstract: Synthetic goethites studied by high-resolution thermogravimetry (HRTGA) show variability in surface characteristics and structural stability as a function of aging conditions. Goethites were...
Phase relations in the system MgO-NaCl-H2O: The dehydroxylation of brucite in the presence of NaCl-H2O fluids
Phase relations MgO-NaCl-H2O dehydroxylation NaCl-H2O fluids
2012/3/31
The dehydroxylation of brucite was determined in the presence of NaCl-H2O fluids containing 0, 2, 6, 11, 14, 18, 30, and 38 mol% NaCl (0.0, 5.5, 17.0, 28.8, 34.5, 41.7,58.2, and 66.6 wt% NaCl) to ;250...
The Dehydroxylation of the Kaolinite Clay Minerals using Infrared Emission Spectroscopy
Dehydroxylation Dickite Emission Halloysite Hydroxyl Infrared Kandite Kaolinite Mechanism of dehydroxylation
2011/12/27
The dehydroxylation of a series of the kaolinite clay minerals, kaolinite, halloysite and dickite, has been investigated by Fourier transform in situ infrared emission spectroscopy over a temperature ...
The Dehydroxylation of Chlorite and the Formation of Topotactic Product Phases
Chlorite Dehydroxylation Topotactic phases X-ray diffraction
2011/12/28
Single-crystal, X-ray examination of Mg,Fe-rich chlorites that were heated at 650°C for 24 hours in air and have undergone dehydroxylation of the interlayer shows that two product phases result with a...
Dehydroxylation of Aluminous Goethite: Unit Cell Dimensions, Crystal Size and Surface Area
Al-substitution Crystal size Dehydroxylation Goethite Hematite Specific surface area Unit cell
2011/12/27
This work investigates unit cell dimensions, crystal size and specific surface area of aluminous goethite that was progressively dehydroxylated to form hematite. Goethite synthesized from the ferrous ...
Dehydroxylation, Rehydroxylation, and Stability of Kaolinite
Dehydroxylation Gibbs free energy Halloysite Hydralsite Hydrothermal Kaolinite Pyrophyllite
2011/11/25
Abstract: From hydrothermal experiments three pressure-temperature-time curves have been refined for the system Al2O3-SiO2-H2O and reversal temperatures established for two of the principal reactions ...
Dehydroxylation of Dioctahedral Phyllosilicates
Dehydroxylation Iron Montmorillonite Mossbauer spectroscopy Oxidation Smectite
2012/2/9
Mossbauer spectroscopy of dioctahedral phyllosilicates showed that on dehydroxylation iron which originally occupied M(2) and M(1) sites became, respectively, 5- and 6-coordinated. The 6-coordinated s...
The Influence of Heat-Stable Intercalate on the Rate of Dehydroxylation of Smectite
Activation energy Dehydroxylation Intercalate Reaction rate constant Smectite
2012/2/10
The rates of dehydroxylation of smectites intercalated with the decomposition products of Ni(phen)3SO4 are from 2 to 4 times greater than those of clays without the heat-stable intercalate. These resu...
Lithium and Potassium Absorption, Dehydroxylation Temperature, and Structural Water Content of Aluminous Smectites
Lithium Potassium Absorption Dehydroxylation Temperature Aluminous
2012/2/20
X-ray analysis of Li+- and K+-saturated samples, differential thermal analysis (DTA), thermal gravimetric analysis (TGA), and chemical analysis of 83 samples enable a distinction to be made between Wy...