搜索结果: 1-15 共查到“地质学 reactions”相关记录50条 . 查询时间(0.051 秒)
Catalytic thermal reactions of cumene over sepiolite and palygorskite
catalytic thermal reactions sepiolite palygorskite
2011/11/10
The catalytic activity of sepiolite and palygorskite in cracking and disproportionation reactions of cumene was studied. The formation of benzene, diisopropylbenzene and propylene characterizes Br鰊ste...
Mechanisms and Crystal Chemistry of Oxidation in Annite: Resolving the Hydrogen-Loss and Vacancy Reactions
Annite Biotite Crystal Chemistry Differential Thermal Analysis Ferrioxyannite Gas Chromatography Mossbauer Spectroscopy
2011/12/5
Abstract: A synthetic octahedral-site-vacancy-free annite sample and its progressive oxidation, induced by heating in air, were studied by powder X-ray diffraction (pXRD), Mössbauer spectroscopy,...
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-...
Experimental determination of CO2-H2O activity-composition relations at 600-1000 °C and 6-14 kbar by reversed decarbonation and dehydration reactions
CO2-H2O activity-composition relations reversed decarbonation dehydration reaction modified Redlich-Kwong
2012/4/1
Activity-composition relations in CO -H O solutions were determined at 6, 10, abroad temperature-fluid composition ranges from 70 reversed determinations of three simple-systemdecarbonation and dehydr...
The surface structure of a-Fe2O3 (001) by scanning tunneling microscopy: Implications for interfacial electron transfer reactions
surface structure scanning tunneling microscopy interfacial electron transfer reactions
2012/3/31
STM images of hematite (?-Fe O ) (001) surfaces taken under a wider variety of conditions than in
previous studies are presented. The results strongly suggest that only Fe sites contribute to the tun...
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...
Dynamic electrochemical assessment of redox reactions in natural micas between 613 and 1373 K at 105 Pa
natural micas 613 and1 373K 105 Pa ZrO2-EMF
2012/3/31
ZrO -EMFmeasurementswerecarriedoutonnaturalbiotitesamplesbetweenabout400
and1100Cinaclosedsysteminapureargonatmosphere(99.9999%).TheEMFpatterns
arecomplexandcannotbecomparedtoclassicalequilibrium1/T...
Reactions of copper and cadmium ions in aqueous solution with goethite, lepidocrocite, mackinawite, and pyrite
copper and cadmium irons goethite lepidocrocite mackinawite andpyrite
2012/3/31
TheuptakeofCuandCdinaqueoussolutionbyinteractionwiththesurfacesofcare-
fullysynthesized?nelysizedparticlesofgoethite,lepidocrocite,mackinawite,andpyrite
wasmeasuredasafunctionofinitialmetalconcentra...
Solid-solid reactions mediated by a gas phase: An experimental study of reaction progress and the role of surfaces in the system olivine+iron metal
Solid-solid reactions olivine+iron metal
2012/4/1
The intergranular fluid involved in solid-solid reactions is tacitly assumed to be a melt or a (C-O-H-S-Cl-F)-bearing phase. We have studied the system olivine 1metal using dif-fusion couple experimen...
Oxygen Isotope Compositions of Mixed-Layer Serpentine-Chlorite and Illite-Smectite in the Tuscaloosa Formation (U.S. Gulf Coast): Implications for Pore Fluids and Mineralogic Reactions
Diagenesis Illite-Smectite Oxygen Isotopes Sandstone Serpentine-Chlorite Tuscaloosa Formation
2011/12/8
Abstract: Oxygen isotopic compositions were determined for coexisting mixed-layer serpentine-chlorite (Sp-Ch) and illite-smectite (I-S) from 5 Tuscaloosa Formation sandstone cores sampled between 1937...
The influence of heating rate on the kinetics of mineral reactions: An experimental study and computer models
heating rate mineral reactions experimental study computer models
2012/3/31
Startling results were obtained in kinetic experiments that varied the initial heating history of the mineral reaction: 1 dolomite 1 2 quartz → 1 diopside 1 2CO2. The exper-iments were carried out at ...
Reactions of aqueous Au1+ sulfide species with pyrite as a function of pH and temperature
Reactions of aqueous Au1+ sulfide species with pyrite as a function of pH and temperature
2012/3/31
The reactivity of aqueous Au11 sulfides with FeS2 at pH 5 3 and 6 for temperatures of 25 and 908C has been investigated using X-ray photoelectron spectroscopy (XPS), scan-ning electron microscopy with...
Illite-Smectite Alteration and Accompanying Reactions in a Pennsylvanian Underclay Studied by TEM
Coal Basin Diagenesis HRTEM Illite/Smectite Paleosol Underclay Weathering
2011/12/22
Abstract: Pennsylvanian underclay from Illinois is characterized by well-developed mineral zonation: towards the coal bed, marly limestone gradually evolves into carbonate-free clay, chlorite becomes ...
Alteration of Silicic Vitric Tuffs Interbedded in Volcaniclastic Deposits of the Southern Basin and Range Province, Mexico: Evidences for Hydrothermal Reactions
Basin and Range Hydrothermal alteration Mass-balance calculations Mexico Smectites Transmission electron microscopy Volcanic tuffs Zeolites
2011/12/1
Abstract: In Northwestern Mexico, the Miocene basins that disrupted the Sierra Madre Occidental Province are filled with sandstones and conglomerates (the Báucarit Formation) cemented mainly by zeolit...
The electronic structure of hematite {001} surfaces: Applications to the interpretation of STM images and heterogeneous surface reactions
electronic structure hematite {001} surfaces Applications interpretation STM images heterogeneous surface reactions
2012/4/9
Scanning tunneling microscope (STM) images and scanning tunneling spectroscopy (STS) spectra of hematite (a-Fe203) surfaces werecalculated using ab-initio methods, not only to interpret experimentally...