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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...