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Polyaniline/attapulgite (PANI/ATP) nanocomposites doped by hydrochloric acid (HCl) were prepared by in-situ polymerization method. The structure and absorption mechanism for eriochrome blue black of n...
Translucent pink opals from Mexico (states of Mapimi and Michoacan) and Peru (Acari area, near Arequipa) are opal- CT, containing from 10 to 40 % palygorskite, as demonstrated by XRD, infrared absorp...
Abstract: The incorporation of transition metals into hematite may limit the aqueous concentration and bioavailabity of several important nutrients and toxic heavy metals. Before predicting how hemati...
Abstract: To assign far infrared (FIR) absorption bands of K+ in muscovite, dichroic experiments were performed. For a muscovite crystal rotated about a crystallographic axis, c*, a, or b, two bands c...
Abstract: The reduction of hexavalent chromium species in aqueous solutions by interaction with Fe(II)-bearing solid surfaces was studied using a 0.96 × l0−3 M Cr(VI) solution and iron-rich clay...
Polarized IR-absorption spectra were measured on inclusion-free spots, 50 ?m in diameter of (100)-, (010)-, and (001)-oriented single-crystal plates of orthorhombic cordierites extracted from anatec...
X-ray absorption fine structure spectroscopy (XAFS) was used to determine arsenic (As) oxidation state, local coordination (to a radius of ┆7Aⅹaround As), and the relative proportion of different As s...
FTIR absorbance spectra of SiO2 glass containing 1200 ppm OH2 groups were recorded in situ to 1975 K. There are only minor changes in peak height to 1700 K, indicating that the molar extinction coeffi...
We present a comparison between XANES experiments and full multiple-scattering cal-culations at the magnesium K-edge for two pyroxenes, diopside and enstatite, for which Mg atoms are only in the M1 si...
UsingIRabsorptiondatafrompolarizedmeasurementsonsingle-crystalmineralswithstoichiometricwatercontents(intheformofHOorOHgroupsinthestructure),alinear calibrationcurve(r 0.98)forwaterinmineralsisestabl...
Abstract: A reservoir rock is a porous geological formation in contact with 2 liquids, brine and oil. An improved knowledge of rock wettability is of primary importance to estimate the amount of crude...
In this paper, sample mass-absorption corrections for X-ray fluorescence trace element analysis are reexamined and a new approach is presented that is moreaccurate and more versatile than current meth...
X-ray absorption spectroscopy (XAS) was used to determine the local molecular environment of Co(II) surface complexes sorbed on three different kaolinites at ambient temperature and pressure in contac...
This paper compares the results of 27Al nuclear magnetic resonance spectroscopy (NMR) and Al-K-edge X-ray Absorption Near Edge Structure (XANES) of natural imogolite and allophanes and some crystallin...
To identify the far-infrared (FIR) absorption bands related to K cations in micas, spectra of muscovite, phlogopite, and biotite were compared with the spectra of pyrophyllite and talc, which have no ...

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