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Analyses the types and characters of the local architecture in the south of Shaanxi Province.Unscrambles the producing process and forming reason from the view of sociology.Uncovers the information ex...
Many soils in arid regions of the world including those of central Iran contain palygorskite and carbonates in their mineral fraction. There is, however, little information on the effects of these min...
Calculated Mn(2p3/2) X-ray photoelectron spectra (XPS) of Mn21,Mn31, and Mn41 free ions are strikingly similar to Mn(2p3/2) spectra of Mn21-, Mn31-, and Mn41 -oxides and oxyhydroxides, indicating tha...
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...
Quartz overgrowths from Keuper sandstones of the Paris basin wereexamined using cathodoluminescence (CL) microscopy and spectroscopy coupled witha scanning electron microscope (SEM). Withthe use ofsta...
Abstract: Ludox HS SiO2 sols at high concentrations show a peak in small angle x-ray scattering (SAXS) reminiscent to a “structure.” The appearance of such a peak was found to depend crucially on the ...
X-ray diffraction and chemical analyses were performed on clay fractions separated from an acid brown soil (Dystrochrept) by means of size fractionations using high-gradient magnetic separation techni...
A new approach to the interpretation of Mössbauer spectra of Fe3+-phyllosilicates having vacant trans-octahedra is based on (1) crystal structure simulation methods that allow for the size and th...
The 57Fe M鰏sbauer spectra of several montmorillonites, measured at room temperature and 453 K, showed a considerably broadened Fe3+ resonance which can be computer-fitted with a similarly broadened Fe...
13C and 29Si nuclear magnetic resonance spectroscopy with magic-angle spinning bas been used to study the short-range ordering and bonding in the structures of intercalates of kaolinite with formamide...
A method of clay mineral sample preparation for electron microprobe analysis has been developed in which a film of clay plus 10–12 wt. % colloidal graphite is deposited on a porous ceramic disc using ...
From the symmetry point of view, micas may be classified as follows: those with all three octahedrally coordinated sites occupied by the same cation (homo-octahedral micas), those with only two of the...
Ion-exchange experiments in expanding clay minerals conducted over a wide range of surface ionic compositions and ionic strength produce variable mass-action selectivity coefficients. When the exchang...
The decreasing preference of montmorillonite for K+ relative to Na+ as the clay adsorbs increasing amounts of K+ is shown to be the general rule for the exchange of strongly hydrating ions by weakly h...
Infrared spectra of nontronite reveal shifts to lower wave, number in peaks located at 3570, 1030, and 821 cm−1, which are assigned to vibrational modes for O-H stretching, Si-Ob (basal oxygens)...

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