搜索结果: 1-15 共查到“地质学 MgSiO3”相关记录15条 . 查询时间(0.078 秒)
Shock-compressed MgSiO3 glass, enstatite, olivine, and quartz: Optical emission, temperatures, and melting
enstatite olivine quartz
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2014/4/8
Optical emission of MgSiO3 glass, enstatite, olivine, and quartz under shock wave
compression was investigated with optical pyrometry at discrete wavelengths ranging
from visible to near infrared. W...
Symmetry change of majorite solid-solution in the system Mg3Al2Si3O12-MgSiO3
single crystals majorite solid-solution Mg3Al2Si3O12-MgSiO3
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2012/3/31
Six single crystals of Mg (Mg Si Al )Si O with x = 0.05, 0.13, 0.24, 0.38, 0.52, and 0.64 (the
3 x x 2(R)Cx 3 12
majorite solid-solution) were synthesized at 20 GPa and 2000 ?C with a °∞6-8°± type ...
Elasticity of MgSiO3 orthoenstatite
MgSiO3 orthoenstatite modulus
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2012/3/31
The single-crystal elastic moduli of the MgSiO orthoenstatite end-member have been measured
by Brillouin spectroscopy at ambient conditions. The aggregate elastic moduli at 1 atm are K
107.6(15) GP...
Estimates of mantle relevant Clapeyron slopes in the MgSiO3 system from high-pressure spectroscopic data
MgSiO3 high-pressure spectroscopic data
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2012/3/30
ThephasediagramforMgSiO wasestimatedusingtheentropy,enthalpy,thermalex-3
pansivity,andvolumesofallthephases.Entropyatthevarious P-T conditionsinthephase
diagramwasestimatedusingstatisticalthermodyna...
Equation of state of MgSiO3 with the perovskite structure based on experimental measurements
MgSiO3 experimental measurement perovskite structure
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2012/3/30
WestudiedMgSiO withtheperovskitestructureheatedtotemperaturesupto1500K3
atpressuresbetween36and110GPawithin-situX-raydiffraction.Thenewpressure-
volume-temperature(P-V-T)datawerecombinedwithliteratu...
Shifts in thermal expansivity with Fe content for solid solutions of MgSiO3-FeSiO3 with the perovskite structure
MgSiO3-FeSiO3 perovskite structure
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2012/3/30
ThisstudypresentsevidencethatforasolidsolutionofMgFe SiO perovskite,the
x x-1 3
shiftinvolumethermalexpansivity,,issmallastheindex x ischanged.Accordingto
dataobtainedtheoreticallybyHamaandSuito(19...
Cation sites in Al-rich MgSiO3 perovskites
Cation sites Al-rich MgSiO3 perovskites
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2012/4/1
Local structure analysis of Al-containing magnesium silicate perovskite has been carried out with X-ray absorption spectra recorded at the Mg, Al, and Si K -edges using the SA32 beam-line of SuperAco ...
Molecular dynamics simulations of phase transitions and melting in perovskite MgSiO3 at mantle pressures
Molecular dynamics simulations phase transitions MgSiO3
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2012/4/1
The high pressure phase transitions and melting of the mantle mineral MgSiO3 with the perovskite structure were investigated using molecular dynamics (MD) simulations of a large system of atoms on a p...
Sound velocities of polycrystalline MgSiO3 -orthopyroxene to 10 GPa at room temperature
Sound velocities polycrystalline MgSiO3 -orthopyroxene temperature
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2012/3/31
A polycrystalline sample of MgSiO3-orthopyroxene was hot pressed at a pressure of 4 GPa and temperature of 975 8 C in a multi-anvil apparatus. The recovered specimen has a bulk density within 1% of th...
Thermoelastic properties of MgSiO3 perovskite as the Debye approach
Thermoelastic properties MgSiO3 perovskite
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2012/3/30
MgSiO 3 perovskite is shown to be a Debye-like mineral by the determination of specific heat, CV, entropy, S, and thermal pressure, D P Th, using the Debye theory up to 1800 K.Sound velocities and bul...
Thermal expansion of MgSiO3 and FeSiO3 ortho- and clinopyroxenes
Thermal expansion MgSiO3 FeSiO3 ortho- clinopyroxenes
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2012/4/5
Unit-cellparametersofsynthetic(Mg,Fe)SiO ortho-andclinopyroxenesweredeter-minedatregularintervalsinthetemperaturerange293¤C1094KusingpowderX-ra
diffractiontechniques.Volumethermalexpansioncoef?cients...
Elastic properties of orthorhombic MgSiO3 perovskite at lower mantle pressures
Elastic properties orthorhombic MgSiO3 perovskite lower mantle pressures
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2012/4/5
ThefullelasticconstanttensoroforthorhombicMgSiO perovskitehasbeendetermined
from?rstprinciplesforthe?rsttimeathighpressureusingtheplane-wavepseudopotential
method.Theathermalelasticmoduli,determined...
High-pressure, high-temperature Raman spectroscopic study of ilmenite-type MgSiO3
High-pressure high-temperature Raman spectroscopic study ilmenite-type MgSiO3
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2012/4/6
High-pressure and high-temperature Raman spectra ofilmenite-type MgSi03have been collected up to 7 GPa and 1030 K,respectively. The observed Raman frequency shifts withpressure and temperature wereuse...
A pressure-induced phase transition in MgSiO3-rich garnet revealed by Raman spectroscopy
pressure-induced phase transition MgSiO3-rich garnet Raman spectroscopy
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2012/4/6
Raman spectra oftwo synthetic, noncubic garnet samples rich in MgSi03component weremeasuredin adiamond-anvil cellto 200kbar atroom temperature. Sample1was pure MgSi03majorite;sample 2wasa solid soluti...
High-pressure X-ray diffraction study and equation of state of MgSiO3 ilmenite
High-pressure X-ray diffraction study equation of state of MgSiO3 ilmenite
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2012/4/5
High-pressure X-ray powder diffraction data for MgSi03ilmenite have been collected up to 28 GPa using a diamond-anvil cell in an energy-dispersive configuration at the storage ring DCI at the LURE (Or...