This article contributes to the development of a thermodynamic model for simulating CO2 solubility in pure water and aqueous brines under different conditions temperature, pressure ionic strength. The modeling activity-fugacity (?-?) approach allows calculating solubility, based on Pitzer electrolyte theory activity coefficient Peng-Robinson's equation state fugacity. present work proposes new ...

We consider two-component fermions with a zero-range interaction both in two and three dimensions calculate the bulk viscosity for an arbitrary scattering length high-temperature regime. evaluate Kubo formula using expansion respect to fugacity, which acts as small parameter at high temperatures. In zero-frequency limit of formula, pinch singularities emerge that reduce order fugacity by one. T...

Synopsis: The oxygen fugacity of the basaltic martian meteorites has been calculated from thermodynamic models involving spinel-ilmenite equilibria. The wide range of estimates, from near the IW buffer to near QFM, may be explained by mixing of mantlederived melts with oxidized material in the martian crust. Possible oxidized crustal end-members are considered. Analytical Method and Results: Sp...

This study presents the first reconstruction of smelting conditions in 16th- to 18th-century smelters from Miedziana Góra (Holy Cross Mountains, Poland). Based on geochemical (inductively coupled plasma mass spectrometry/emission spectrometry, X-ray fluorescence) and mineralogical analysis (X-ray diffractometry, scanning electron microscopy, probe micro-analysis) historical slags, their chemica...

We consider self-avoiding polygons on the simple cubic lattice with a torsion fugacity. We use Monte Carlo methods to generate large samples as a function of the torsion fugacity and the number of edges in the polygon. Using these data we investigate the shapes of the polygons at large torsion fugacity and find evidence that the polygons have substantial helical character. In addition, we show ...

Relationships between the recrystallized grain size and stress are investigated for experimentally deformed water-added quartz aggregates. For stresses ≥100 MPa there is a variation in measured given stress. This correlates with change c-axis fabric general shear experiments, where samples larger sizes have dominantly prism fabrics smaller basal fabrics. The dislocation creep flow law also ...

• Uranium solubility has been determined in soda-lime aluminosilicate glasses HR-XANES can be used to determine uranium oxidation states glass melt decreases the order U VI > V IV The hexavalent content is a key factor for melts of Na 2 O-CaO-Al O 3 -SiO system with two different Na/Ca ratios was studied at temperatures 1250–1400°C and under various redox conditions. A closed thermochemical rea...

The basic aspects of redox geochemistry are reviewed to provide a useful compendium the connection between aqueous-hydrothermal and igneous realms Earth. description system is intimately coupled knowledge acid-base properties solvent in which exchanges take place. For magmas, then silicate melts, approaches reporting state were so far cantered around sole concept oxygen fugacity, f O 2 . Master...

We apply the Yang-Lee theory of phase transitions to an urn model for the separation of sand. The effective partition function of this nonequilibrium system can be expressed as a polynomial of the size-dependent effective fugacity z. Numerical calculations show that in the thermodynamic limit the zeros of the effective partition function are located on the unit circle in the complex z plane. In...