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Browsing Геология России by Title
Now showing items 2495-2514 of 39195
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(2003)Na-cancrinite [ideal composition: Na8(AlSiO4)*(OH)2*8H2O] has been synthesized in a mixture of 1,3- or 1,4-butanediol and water either with direct reactants (silica sources: tetraethoxysilane, precipitated silica, alumina ...
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(2002)The Mossbauer spectra of several blue beryls have been obtained in the temperature range of 4.2-500 K. A common feature observed in all room-temperature spectra is the presence of an asymmetric Fe2+ublet (ΔEQ5> ~ 2.7 mm ...
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(2004)The retention of Cu and Cu-amino acid complexes by montmorillonite and beidellite, before and after repeated acidified aqueous solution treatments, was studied using X-ray diffraction, chemical and thermal analyses, mass ...
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(2005)The sedimentary series from Academician Ridge, Lake Baikal, eastern Siberia, was examined using cation exchange capacity (CEC) to estimate the amount of expandable clay minerals (ECM) and high-temperature X-ray diffraction ...
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(2004)The characterization of individual magnetic components in sediments and sedimentary rocks is difficult, as these natural materials are often a complex mixture of magnetic mineral sources. The analysis of magnetization ...
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(2003)Microstructural changes induced by the microbial reduction of Fe(III) in nontronite by Shewanella oneidensis were studied using environmental cell (EC)-transmission electron microscopy (TEM), conventional TEM, and X-ray ...
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(2002)A significant quantity of hydrocarbons (including alkanes) is occluded in the skeleton of the asphaltene molecule. The hydrocarbons are probably remnants of the ''original oil'' which had been retained within the asphaltene ...
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(2001)A synthesis technique is described which results in >99% pure NH4-phlogopite (NH4) (Mg3) [AlSi3O10] (OH)2 and its deuterium analogue ND4-phlogopite (ND4) (Mg3) [AlSi3O10] (OD)2. Both phases are characterised using both ...
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(1999)Fourie r transform infrared (FTIR) spectroscopy investigations in the near infrared (N1R) region of synthetic and natural kaolinites with various octahedral substitutions have been carried out in order to elucidate the ...
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(1998)Speciation of salicylate anions (o-hydroxybenzoate) adsorbed on aqueous colloidal alumina (δ-Al2O3) was determined by polarized fluorescence excitation spectroscopy. Adsorption isotherms and pH and ionic strength edges ...
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(2003)FTIR spectroscopy has been applied to NH⁺4-exchanged dioctahedral clay minerals to determine the molecular environment of NH⁺4 and to quantify N concentration. FTIR under vapour-pressure control, coupled with heating and ...
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(2003)Many workers have explored anisotropy of magnetic susceptibility (AMS) of sediments as an indicator of deformation. Several studies have used deflection of the eigenvector associated with the minimum in susceptibility, V3, ...
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(2001)This study attempted to characterize the spatial patterns of lead (Pb) for further soil monitoring and remediation by comparing the sequential Gaussian simulation, simulated annealing techniques and ordinary kriging methods ...
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(2004)Clinopyroxenes along the solid solution series hedenbergite (CaFeSi2O6)-petedunnite (CaZnSi2O6) were synthesized under hydrothermal conditions and different oxygen fugacities at temperatures of 700 to 1200 °C and pressures ...
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(2001)The stratigraphic range of stromatoporoids in the Devonian of the Russian Platform and the taxonomic composition of stromatoporoids are emended; new generic names and new descriptions of two known species are presented. ...
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(1992)Complex X-ray diffraction (XRD) profiles are described crystallographically by simulating XRD peaks for each phase, and adding the various elementary patterns to fit the experimental X-ray pattern. X-ray patterns of a ...
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(2003)Manganese oxides form typically in natural aqueous environments via Mn(II) oxidation catalyzed by microorganisms, primarily bacteria, but little is known about the structure of the incipient solid-phase products. The Mn ...
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(2003)A thin film of marcasite, FeS2, was synthesized under vacuum and its structure and reactivity under oxidizing conditions was investigated by means of diffraction and surface analytical techniques, respectively. Synthesis ...
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(2001)This paper is concerned with the application of fractal analysis to understand the structure of water-worked gravel-bed river surfaces. High resolution digital elevation models, acquired using digital photogrammetric ...
Now showing items 2495-2514 of 39195