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Detection of the 69 μm band of crystalline forsterite in the Herschel MESS-program
crystalline forsterite Herschel MESS-program
2010/11/11
In this article we present the detection of the 69 μm band of the crystalline olivine forsterite within the MESS key program of Herschel. We determine the temperature of the forsterite grains by fitti...
Determining the forsterite abundance of the dust around AGB stars
forsterite abundance of the dust AGB stars
2010/11/11
We present a diagnostic tool to determine the forsterite abundance of the dust ejected by AGB stars. Our method is based on a comparison between the observed strength of spectral bands of forsterite a...
Three- and five-quantum 17O MAS NMR of forsterite Mg2SiO4
Three- and five-quantum 17O MAS NMR forsterite Mg2SiO4
2012/3/31
17Three- and five-quantum O MAS NMR experiments are used to resolve fully the three crystallo-
graphically distinct oxygen species in forsterite (Mg
SiO ). The chemical shift and quadrupolar pa-2 4...
Experimental determination of the reaction: Magnesite + enstatite = forsterite + CO2 in the ranges 6-25 kbar and 700-1100 篊
Experimental determination Magnesite + enstatite = forsterite + CO2
2012/3/31
he P - T equilibrium curve of the reaction of magnesite 1 enstatite 5 forsterite and CO2 was determined in the ranges 6?5 kbar and 700?100 8 C by 53 reversed experiments carried out in 1.91 cm diamete...
The reaction talc + forsterite = enstatite + H2O: New experimental results and petrological implications
reaction talc H2O New experimental results
2012/3/30
The reaction talc 1 forsterite 5 enstatite 1 H2O has been investigated between 6 and 20 kbar. Previous high-pressure experimental studies suggested various reaction positions,mostly with positive P - ...
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...
Crystal chemistry of forsterite: A first-principles study
Crystal chemistry forsterite first-principles study
2012/4/5
Wepresenta?rst-principlesstudy(localdensityapproximation)ofthestructuralprop-
ertiesofforsteriteunderpressure.Thishighlyanisotropicmagnesiumorthosilicateisthe
mostabundantphaseoftheEarth!flsupperman...
Cathodoluminescence of meteoritic and synthetic forsterite at 296 and 77 K using TEM
Cathodoluminescence meteoritic synthetic forsterite 296 77 K using TEM
2012/4/5
Cathodoluminescence(CL)emissionspectraofforsteritefromtheAllende(CV3)and
Murchison(C2)meteoritesandfromCr-dopedandpuresyntheticforsteritesampleshave
beenobtainedatroom(296K)andliquidnitrogen(77K)tem...
Magnesium site exchange in forsterite: A direct measurement by high-temperature 25Mg NMR spectroscopy
Magnesium site forsterite measurement high-temperature 25Mg NMR spectroscopy
2012/4/9
High-resolution 25MgNMR data are reported for a single crystal of pure forsterite (Mg2Si04) at temperatures to about 1400°C, which allow rates of exchange ofMgcations among specific sites in the struc...
Ab initio calculation of electric-field--gradient tensors of forsterite
Ab initio calculation electric-field--gradient tensors forsterite
2012/4/5
Abinitio band-structure calculations based on the density functional theory have been performed for forsterite to obtain, witha parameter-free model, electric-field gradients for all nuclei. Calculati...
The equation of state of forsterite to 17.2 GPa and effects of pressure media
state of forsterite 17.2 GPa pressure media
2012/4/5
Pressure-volume X-raydiffractiondata werecollectedat eightpressuresto 17.2GPa for synthetic single-crystalforsterite, Mg2Si04.Birch-Murnaghanequation-of-state param-eters weredetermined to beKo= 125(2...
An ab initio study of the compressional behavior of forsterite
ab initio study the compressional behavior forsterite
2012/4/5
Abinitio calculations using the local density approximation and pseudo potentials were made on forsterite from 0 to 700 kbar. Our calculations are generally consistent with almost all the experimental...