منابع مشابه
Phosphorus K-edge XANES spectroscopy of mineral standards
Phosphorus K-edge X-ray absorption near-edge structure (XANES) spectroscopy was performed on phosphate mineral specimens including (a) twelve specimens from the apatite group covering a range of compositional variation and crystallinity; (b) six non-apatite calcium-rich phosphate minerals; (c) 15 aluminium-rich phosphate minerals; (d) ten phosphate minerals rich in either reduced iron or mangan...
متن کاملSample thickness and quantitative concentration measurements in Br K-edge XANES spectroscopy of organic materials.
While XANES spectroscopy is an established tool for quantitative information on chemical structure and speciation, elemental concentrations are generally quantified by other methods. The edge step in XANES spectra represents the absolute amount of the measured element in the sample, but matrix effects and sample thickness complicate the extraction of accurate concentrations from XANES measureme...
متن کاملSulfur K-edge XANES Spectroscopy as a Tool for Understanding Sulfur Dynamics in Soil Organic Matter
in oxidation states. Sulfur occurs in soil both in organic and inorganic forms. However, most of the soil S Sulfur K-edge X-ray absorption spectroscopy (XANES) was used ( 95%) in temperate and tropical ecosystems is present to identify S oxidation states and assess the impact of land use changes on the amount, form, and distribution of organic S in particle-size in organic forms (Janzen and Ell...
متن کاملMg K-edge XANES of sepiolite and palygorskite
a £SRF, BP 220 F-38043 Grenoble Cedex, France b Dpto, Geologia, Universidad de Salamanca, £-37008 Salamanca, Spain C Dpto. Cristalogra/ia y Mineralogia, U Complutense de Madrid, £-28040 Madrid, Spain d INFM, clo £SRF, BP 220 F-38043 Grenoble Cedex, France e Lab. Cristallographie, CN RS, Grenoble BP 166, F-38042 Grenoble Cedex 09, France f INAH, Mexico DF, Mexico g TASC-INFM Area Science Park, 1...
متن کاملElectronic structure effects on B K-edge XANES of minerals.
In order to assess the usability of X-ray absorption near-edge structure (XANES) for studying the structure of BO(n)-containing materials, the dependence of theoretical XANES at the B K-edge on the way the scattering potential is constructed is investigated. Real-space multiple-scattering calculations are performed for self-consistent and non-self-consistent potentials and for different ways of...
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ژورنال
عنوان ژورنال: Journal of Synchrotron Radiation
سال: 2019
ISSN: 1600-5775
DOI: 10.1107/s160057751900540x