Mean SiOSi bond angles from recently published single crystal X-ray refinements of improved accuracy are used in the calculations. Good agreement between theoretical and experimental spectra as well as between the bond angles from XRD and those calculated from 29Si chemical shifts has been found ...
Handbook of X Ray Photoelectron Spectroscopy: A Reference Book of Standard Spectra for Identification and Interpretation of Xps Data J Moulder,J Chastain,RC King 被引量: 0发表: 1995年 TiO2 nanopowders doped with boron and nitrogen for photocatalytic applications X-ray diffraction (XRD), Raman ...
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Sixty-six samples from a total of 71 collected samples were analysed for SiO2, TiO2, Al2O3, Fe2O3, CaO, MgO, Na2O, K2O, P2O5, Sr, U and Pb by XRF and their mineral constituents were determined by the use of XRD techniques. In addition, the natural radioactivity of the phosphatic ...
XRD has identified 5 to 8 weight percent clay minerals with illite composing approximately 2/3 of the clay and the remainder being chlorite. Klinkenberg permeability ranges from 0.010 to 0.125 millidarcies. The interpreted depositional environment of the Gray Sand interval in the Willamette well is...
The results of the recomputed spectroscopy volumes compare favorably to traditional techniques and are also validated by petrography, and Dual Range Fourier Transform Infrared (DRFT-IR)or X-Ray Diffraction(XRD)data. Several examples from cretaceous age reservoirs are presented to demonstrate the ...
Finally, the original XRD data are reexamined and found to be insufficient to unequivocally ascribe observed behavior to that of an ordered material with a well-established and confirmed structure containing strictly interstitial oxygen anions. The hyperstoichiometric oxide PuO[sub2+x-]H[sub2]O ...
However, it is impossible to accurately measure the porosity of all formations through experimental methods, well logging data is needed to predict porosity. Common methods include statistical methods (e.g., intersection graph method, multiple regression method), multi-component volume model method, ...
Calcium zincate microcrystals are successfully prepared with calcium carbonate and zinc oxide as reactants in alkaline solution without protective atmosphere. The structure and composition are analyzed by X-ray powder diffraction (XRD) analysis, thermodiffractometry, scanning electron microscope (SEM), ...