Oxygen diffusion in garnet: Experimental calibration and implications for timescales of metamorphic processes and retention of primary O isotopic signatures
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The diffusion of Mn, Cr, and Ti in single crystalline copper was investigated in the temperature range between 582 and 800 K, 639 and 829 It and 621 and 747 K, respectively. Ion beam sputtering in combination with secondary ion mass spectrometry (SIMS) was ...
Electrochemical techniques were applied to a coulometric titration cell to study oxygen nonstoichiometry and transport in the perovskite-type oxide La0.4Ba0.6Fe0.8Co0.2O3-delta. Slow scan voltammetry (3mV/s) was used to obtain oxygen nonstoichiometry vs. t ...
The factors controlling leachate composition of cement stabilized air pollution control (APC) residues (41% APC residues, 22% cement, 3% Na2CO3, and 32% water, w/w) have been investigated both in the laboratory ansi in a pilot landfill. Batch leaching and ...
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Quantitative Secondary Ion Mass Spectrometry (SIMS) determination of oxygen incorporation in epitaxial AlGaAs/GaAs layers is strongly affected by the presence of oxygen adsorbed on the surface. By flooding the sample with oxygen isotope O18 during the anal ...
Long-term evolution of the Earth's water cycle is investigated to predict potential variations in the hydrogen stable isotope composition of seawater. Mass balance calculations are used to estimate the delta D value of the early ocean before storage of wat ...
We investigate at the atomic scale the oxygen diffusion process occurring during silicon oxidation. First, we address the energetics of several oxygen species in the oxide using density-functional calculations. Our results support the interstitial O-2 mole ...
Mineral inclusions in Sao Luiz diamonds have been characterized using angle dispersive X-ray diffraction and Raman spectroscopy. We identified two different garnet phases coexisting with an omphacitic pyroxene. They represent disintegration products of a f ...
Biological control over coral skeletal composition is poorly understood but critically important to paleoenvironmental reconstructions. We present microanalytical measurements of trace-element abundances as well as oxygen and carbon isotopic compositions o ...
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