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搜索结果: 1-10 共查到地质学 Forsterite相关记录10条 . 查询时间(0.046 秒)
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...
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 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 - ...
Abinitiocalculationsonsimpleionicvacanciesinforsteriteshowthattherearelargeenergeticdifferencesbetweenvacanciesonnonequivalentsites.OxygendefectsontheO3sitearebetween1and3eVlowerinenergythanontheO2and...
Wepresenta?rst-principlesstudy(localdensityapproximation)ofthestructuralprop- ertiesofforsteriteunderpressure.Thishighlyanisotropicmagnesiumorthosilicateisthe mostabundantphaseoftheEarth!flsupperman...
Cathodoluminescence(CL)emissionspectraofforsteritefromtheAllende(CV3)and Murchison(C2)meteoritesandfromCr-dopedandpuresyntheticforsteritesampleshave beenobtainedatroom(296K)andliquidnitrogen(77K)tem...
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...
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...
Pressure-volume X-raydiffractiondata werecollectedat eightpressuresto 17.2GPa for synthetic single-crystalforsterite, Mg2Si04.Birch-Murnaghanequation-of-state param-eters weredetermined to beKo= 125(2...
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...

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