Synchrotron SXRF

Abstract Mobile Au in soil has been postulated for many years. It has been used by the mineral exploration industry in areas of transported overburden as a vector towards buried deposits. Until now, the nature of this mobile Au has not been known or investigated. Soil samples from a colluvial area above the Bounty Deposit (Yilgarn Craton, Western Australia) investigated by analytical techniques including laser ablation inductively coupled mass spectrometry (LA-ICP-MS) and synchrotron x-ray fluorescence (SXRF) combined with X-ray absorption spectrometry (XAS) have allowed us to map the invisible Au in these soils and suggests that at least some of it occurs in an ionic form. 

MCB MCC MINEQL MOX MSWI p,-SXRF MW Microwave burn-out Materials Characterization Center Mineral equilibria (computer program) Mixed-oxide (fuel) Municipal solid waste incinerator Synchrotron-based X-ray microfluorescence Magnox waste glass (British Nuclear Fuel Public Ltd. Company)... 

Micro SXRF (Synchrotron-based micro-X-ray fluorescence) spectroscopy is an excellent tool to study elemental distributions on microscopic level. This method helps to understand the role of particular minerals in sorption properties of complex mineral assemblies. Iron and managanese oxide phases were detected in polished thin sections of natural zeolitic tuff by SXRF. This section was contacted with synthetic ground water containing Pu(V), and Pu was found to be predominantly associated with manganese oxide, but not with hematite [41]. Micro SXRF can be combined with micro-XANES, and micro-EXAFS to determine the oxidation state and coordination environment of Pu adsorbed at different regions of the tuff [42]. 

SXRF synchrotron radiation-induced X-ray emission spectrometry (see SRXRF)... 

Messenger S, Walker RM (1998) Possible association of isotopically anomalous cluster IDPs with comet Schwassmann-Wachmann 3. Lunar and Planetary Science XXIX, 1906 Mosbah M, Curaud JP, Metrich N, Wu Z, Delaney JS, San Miguel A (1999) Micro-XANES with synchrotron radiation a complementary tool of micro-PIXE and micro-SXRF for the determination of oxidation state of elements. Application to geological materials. Nucl Instrum Methods Phys Res 158 214-220... 

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