搜索结果: 1-15 共查到“矿床学与矿相学 diffusion”相关记录24条 . 查询时间(0.046 秒)
Hydrogen in diopside: Diffusion, kinetics of extraction-incorporation, and solubility
Hydrogen diopside Diffusion kinetics extraction-incorporation solubility
2012/4/1
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 ...
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 ...
Complex zoning in apatite from the Idaho batholith: A record of magma mixing and intracrystalline trace element diffusion
Idaho batholith magma mixing intracrystalline trace element diffusion REE
2012/3/31
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,
...
Pressure dependence of self-diffusion in the NaAlO2-SiO2 system: Compositional effects and mechanisms
pressures NaAlO2-SiO2 Compositional effects mechanisms
2012/3/30
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...
Multicomponent diffusion in the molten system K2O-Na2O-Al2O3-SiO2-H2O
Multicomponent diffusion K2O-Na2O-Al2O3-SiO2-H2O
2012/3/31
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...
Dehydration, Diffusion and Entrapment of Zinc in Bentonite
Bentonite Entrapment Interaction Micropore Diffusion Speciation Zinc
2011/12/8
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...
Ab initio calculations on point defects in forsterite (Mg2SiO4) and implications for diffusion and creep
Ab initio calculations point defects forsterite Mg2SiO4 diffusion creep
2012/4/6
Abinitiocalculationsonsimpleionicvacanciesinforsteriteshowthattherearelargeenergeticdifferencesbetweenvacanciesonnonequivalentsites.OxygendefectsontheO3sitearebetween1and3eVlowerinenergythanontheO2and...
Na, K, Rb and Cs exchange in heulandite single crystals: Diffusion kinetics
Na K Rb Cs exchange heulandite single Diffusion kinetics
2012/4/5
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...
Constraint on the time scale of biotite-grade metamorphism during Acadian orogeny from a natural garnet-garnet diffusion couple
Constraint biotite-grade metamorphism Acadian orogeny garnet-garnet diffusion couple
2012/4/6
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...
Molecular Structure Effects on Diffusion of Cations in Clays
Clay-modified electrodes Co complexes Diffusion Transport
2011/12/27
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: Is it an Important Transport Mechanism in Compacted Clays?
Compacted clays Surface diffusion Transport mechanism
2011/12/29
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...
