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Browsing ELibrary by Title
Now showing items 13218-13237 of 21934
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(2003)The standard thermodynamic properties and Helgeson-Kirkham-Flowers (HKF) parameters for Sb(OH)3(aq) have been estimated. For this purpose, the available solubility data for senarmontite, valentinite, stibnite, and native ...
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(2005)The low-temperature heat capacity of uvarovite (Ca3Cr2Si3O12) was measured between 2 and 400 K, and thermochernical functions were derived from the results. The measured heat-capacity curve shows a significant lambda-shaped ...
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THERMODYNAMIC STABILITY ANALYSIS OF THE CARBON BIOGEOCHEMICAL CYCLE IN AQUATIC SHALLOW ENVIRONMENTS (1996)We carry out the thermodynamic stability analysis of the carbon cycle in a lagoon. Our approach differs from linear stability analysis, and is based on the excess entropy production. The coupled biogeochemical processes ...
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(2004)The heat capacity (C0p298 ) and entropy (S0298) of elementary substances that occur in a solid, liquid, or gaseous state under standard conditions (T = 298 K and P = 1 atm) are the only thermodynamic properties of chemical ...
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(2002)High-temperature oxide-melt calorimetry and Rietveld refinement of powder X-ray diffraction patterns were used to investigate the energetics and structure of the hematite-corundum solid solution and ternary phase FeAlO3 ...
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(1995)Natural cummingtonite encompasses virtually the entire compositional range from Mg to Fe end-member. It occurs in several metamorphic rock types, but predominantly in amphibolites and metaironstones. Most examples were ...
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(1999)This paper deals with the process of the development of a viscoplastic envelope around a magma conduit and an accompanying hydrothermal system. It is estimated that the discharge of hot water at the surface (possibly as ...
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(1999)The thermodynamic properties of garnets in the system (Fe^2+, Mn^2+, Mg, Ca)3A12Si3O12 are reviewed. The thermodynamic properties of the three end-member garnets pyrope, almandine and grossular, including their volume, ...
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(2000)We have developed a cluster variation method (CVM) model based on cuboctahedral and octahedral basis clusters containing 13 and 6 atoms, respectively, and applied it to the analysis of the thermodynamic mixing properties ...
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(1997)We have experimentally determined the displacement of the equilibrium Grossular + 2 Kyanite + Quartz ↔ 3 Anorthite (GASP) as a function of garnet composition in the systems Mg-Ca-Mn, Fe-Mg-Ca and Fe-Mg-Ca-Mn at 1000°C. The ...
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(1989)Apparent molar heat capacities and volumes of aqueous solutions containing UO2(ClO4)2 in dilute (≈0.06 molal) HClO4 have been determined from 10 to 55°C. These results have been analyzed using Young's rule to obtain apparent ...
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(1998)Analysis of thermodynamic properties of geomaterials at high pressures and temperatures existing in the Earth's interior is presented. The presentation includes a summary on the determination of equations of state based ...
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(2003)The heat capacities (Cp) of goethite (goe, α-FeOOH), lepidocrocite (lep, γ-FeOOH), and maghemite (mag, γ-Fe2O3) were measured from below liquid helium temperature up to their decomposition temperatures by a combination of ...
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(1998)We have developed models for the thermody-namic properties of nephelines, kalsilites, and leucites in the simple system NaAlSiO4−KAlSiO4−Ca0.5AlSiO4−SiO2−H2O that are consistent with all known constraints on subsolidus ...
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(2004)Enthalpies of formation of ferrihydrite and schwertmannite were measured by acid solution calorimetry in 5 N HCl at 298 K. The published thermodynamic data for these two phases and ε-Fe2O3 were evaluated, and the best ...
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(2004)Static lattice energy calculations have been combined with cluster expansion formalism to predict pairwise ordering interactions in the pyrope-grossular solid solution. The ordering interactions, the Js, have been then ...
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(2002)Solution calorimetry and phase equilibrium data for the diopside-jadeite system are assessed using a combination of the cluster variation method (CVM) and Redlich-Kister (RK) polynomial expansion. The CVM is used to model ...
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(2002)In Part I (Vinograd, 2002) the relationship between temperature, composition and free energy of the diopside-jadeite solid solution was described using a CVM model. Here the same relationship is described using a combination ...
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(1993)Molten calcium halide and hydroxide salts may be used as flux and reactants in determining apatite exchange equilibria and solid solution behavior. New experimental data and published phase equilibria are used to determine ...
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(1994)The model for the thermodynamic properties of multicomponent pyroxenes (Part I) is calibrated for ortho- and clinopyroxenes in the quadrilateral subsystem defined by the end-member components Mg2Si2O6, CaMgSi2O6, CaFeSi2O6, ...
Now showing items 13218-13237 of 21934