Phase transition and equation of state of dense hydrous silica up to 63 GPa
نویسندگان
چکیده
منابع مشابه
Extension of the Dense System Equation of State to Electrolyte Solutions
In this work we have applied the Dense System Equation of State (DSEOS) to electrolyte solutions. We have found that this equation of state can predict the density of electrolyte solutions very accurately. It has been tested for different electrolytes solutions at different temperatures and compositions. A hypothetical binary model has been applied to find the dependencies of parameters of ...
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The equation of state (EOS) of warm dense hydrogen is treated theoretically by a free energy approach. At low densities hydrogen is a molecular fluid which can be described by fluid variational theory. Dissociation of molecules is treated self-consistently and thermodynamic properties of the neutral fluid can be given via standard relations, see [1] for details. At high densities hydrogen is pr...
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The crystal structure of hydrous pure magnesium forsterite (Mg2SiO4) containing 8900 ppmw H2O, synthesized at 12 GPa and 1250 °C, has been refined. The major hydration mechanism appears to be M1 cation vacancy with protonation of the O1-O2 octahedral edge of M1. Raman spectra up to 41 GPa show strong coupling between the two Ag modes (824.4 and 856.2 cm–1). Mode Grüneisen parameters γi related ...
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[1] Knowledge of the pressure effect on elasticity of hydrous olivine polymorphs is necessary to model seismic wave speeds for potential hydrous regions of the mantle. Here we report single-crystal elastic properties of wadsleyite, b-Mg2SiO4, with 0.84 wt.% H2O measured to 12 GPa by Brillouin scattering. Pressure derivatives of the aggregate bulk modulus, KS0, and shear modulus, G 0 0, of hydro...
متن کاملEquation of state measurements in liquid deuterium to 70 GPa.
Using intense magnetic pressure, a method was developed to launch flyer plates to velocities in excess of 20 km/s. This technique was used to perform plate-impact, shock wave experiments on cryogenic liquid deuterium ( L-D(2)) to examine its high-pressure equation of state. Using an impedance matching method, Hugoniot measurements were obtained in the pressure range of 30-70 GPa. The results of...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2017
ISSN: 2169-9313,2169-9356
DOI: 10.1002/2017jb014055