Browsing ELibrary by Subject "HEMATITE"
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Browsing ELibrary by Subject "HEMATITE"
Now showing items 1-9 of 9
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(2006)Using a simple ionic model with polarizable oxygen ions and dissociating water molecules, we have calculated the energetics governing the distribution of Fe(II)/Fe(III) ions at the reduced (2 ? 1) surface of ?-Fe2O3 ...
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(2002)A novel method for synthesis of aluminium hematites, based upon the homogeneous precipitation of Fe and Al oxinates in various proportions, is presented. The precursor precipitates are heated in air at 700 °C. X-ray ...
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(2001)Mineralogical discrimination of iron oxides in soils and sediments is not a trivial task, mainly because of their small grain size and low concentration. With mineral-magnetic techniques, highly magnetic ferrimagnetic ...
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IMAGING THE HETEROGENEITY OF MINERAL SURFACE REACTIVITY USING AG(I) AND SYNCHROTRON X-RAY MICROSCOPY (2003)Microscopic-scale imaging of reduced zones on the surfaces of minerals can be achieved by reaction with dilute Ag(I) solutions and subsequent analysis using synchrotron X-ray microscopy (XRM) above the Ag K-edge (25.5 keV). ...
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(2000)The dehydration of goethite has been studied by low-temperature induced magnetization (LTIM) and X-ray diffraction on well-characterized acicular crystals. Fresh samples were heated in air to temperatures between 155°C and ...
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(2006)Electron transfer between redox active proteins and mineral oxides is important in a variety of natural as well as technological processes, including electron transfer from dissimilatory metal-reducing bacteria to minerals. ...
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(2003)We report strong magnetic linear dichroism (MLD) at the Fe L23 and O K edges of the antiferromagnetic compound hematite α-Fe2 O3 in high-resolution orientation- and temperature-dependent electron energy-loss spectroscopy ...
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(2002)High-temperature oxide-melt calorimetry and Rietveld refinement of powder X-ray diffraction patterns were used to investigate the energetics and structure of the hematite-corundum solid solution and ternary phase FeAlO3 ...
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(2000)Intense magnetic remanence (100-1000 A/m) associated with MD hematite and/or titanohematite and associated with high Koenigsberger ratios (40-1000) indicate that magnetic remanence may dominate the total magnetization if ...
Now showing items 1-9 of 9