Browsing ELibrary by Subject "RARE EARTH ELEMENTS"
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Browsing ELibrary by Subject "RARE EARTH ELEMENTS"
Now showing items 1-9 of 9
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(2002)A novel flow-through method for cleaning and dissolving foraminiferal shells is presented. Using automated chromatographic equipment, the system chemically removes contaminant phases from the shells. The cleaned calcite ...
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(1998)The solubilities of pure synthetic La and Gd hydroxides were measured in aqueous solutions over a wide range of pH (5-9.5) and temperature (40-150°C). The regression of these data is used to determine the first dissociation ...
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(2003)Combined histological and geochemical analyses demonstrate complex processes leading to preservation of microbially altered bone. In certain situations, a chemical microenvironment distinct from surrounding pore waters is ...
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(1999)Cathodoluminescence (CL) investigations of igneous, metamorphic and sedimentary feldspars indicate that rare earth elements (REE)-activated CL in feldspars is more common than previously assumed. Hot-cathode CL microscopy ...
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(1997)The knowledge of rare-earth element (REE) and high field-strength element (HFSE) partitioning between minerals such as amphibole, pyroxenes or garnet and tonalitic liquids is essential to understand where and how tonalitic ...
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(2000)The stability of aqueous complexes formed by gadolinium (Gd3+) and ytterbium (Yb3+) aqueous species with the acetate ion (AcO-) was investigated at 25°C, 40°C, 60°C and 80°C, and saturated vapor pressure, using potentiometric ...
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(2001)The diffusion of Sr, Y and three rare earth elements (Nd, Dy and Yb) has been measured in natural fluorite under dry 1-atm conditions. Sources of diffusant consisted of mixtures of Sr, Y, or REE fluorides and CaF2 powders, ...
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(2000)The concentration quotients for the following reactions with acetate have been measured at temperatures from 25°C to 225°C, at saturated water vapor pressure, and in 0.1 molal NaCl medium, using a potentiometric ...
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(1996)On the basis of different proportions and chemical compositions of shield and post-shield magmas, three types of oceanic intraplate volcanism appear to exist. The average SiO2 contents of primitive melts of most Pacific ...
Now showing items 1-9 of 9