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The kinetic of H extraction-incorporation in diopside single-crystals (Ca . Na Cr Mg0 97 0.02 0.01 0.97Fe Si O ) deduced by monitoring OH infrared absorption bands for samples heated from 973 to0.036 ...
Diffusion of Ca and Mg in calcite     Diffusion  Ca  Mg  calcite       2012/4/1
The self-diffusion of Ca and the tracer diffusion of Mg in calcite have been measured experimen-Mg and Ca. Natural single crystals of calcite were coated with atally using isotopic tracers of gas at ...
Apatite crystals in a sample of biotite granodiorite from the Idaho batholith display complex chemi- cal zoning, characterized by abrupt changes in REE+Y+Si content, more subtle variations in S, Na, ...
MolecularDynamics(MD)simulationswereusedtostudytherelationshipbetween structureandtransportpropertiesin?veliquids(NaAlO O ,andNaAlSi O )inthesystemNaAlO -NaAlSi O attemperaturesrangingfrom 4000to60...
Oxygen self-diffusion in rutile was studied in synthetic and natural samples over the temperature range 750 to 1000 8 C and the pressure range 0.1 to 1000 MPa using an 18 O-enriched source. Most exper...
We have measured multicomponent chemical diffusion coefficients in a melt near to the low pressure water-saturated eutectic granite composition in the system K2O-Na2O-Al2O3-SiO2-H2O at 1.0 GPa and te...
Abstract: Interactions with bentonite are important in the chemical speciation and fate of heavy metals in soils and other ecosystems. The interactions of Zn with bentonite were studied using X-ray di...
Abinitiocalculationsonsimpleionicvacanciesinforsteriteshowthattherearelargeenergeticdifferencesbetweenvacanciesonnonequivalentsites.OxygendefectsontheO3sitearebetween1and3eVlowerinenergythanontheO2and...
Diffusion-exchangekineticsweredeterminedattemperaturesbetween320and425KforNa insinglecrystalsofnaturalheulandite,Na Ca K (Al Si O )!/n O,and 0.96 3.54 0.09 8.62 27.51 72 2K,Rb ,andCs forNa inNa-exch...
Wehavedetermined the concentration profilesacross the interface ofanatural garnet-garnet couple in a biotite-grade rock from eastern Vermont.Thecouple consists ofa grossular-spessartine garnet that ha...
Hydrothermal bulk-loss experiments employing radiogenic Ar(4°Ar*) wereperformed to determine whether 40 Ar*diffusivity in biotite increases withFecontent. Diffusion laws determined for intermediate an...
Abstract: The roles of molecular structure and charge are examined in the transport of cations within montmorillonite clay films. The series of Ru(NH3)63+, Co(NH3)3+, Co(en)33+, Co(sep)3+ and Co(bpy)3...
Dehydrogenation experiments have been performed on natural pyrope megacrysts (PY7oAlmI6GrI4) containing 22-112 ppm total H20 by weight (H/Si is from 0.00035 to 0.0018). The concentrations ofOH in pyr...
Useofa thin-film technique and an ion microprobe makeit possible to conduct cation self-diffusion experiments of44Ca in near end-member grossular garnet at temperatures of 800-1O?0 0c. The.e~periments...
Surface diffusion, or migration within the electrical double layer next to mineral surfaces, is often invoked as a significant contributor to the overall diffusion coefficient in compacted clays, part...

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