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Browsing ELibrary by Title
Now showing items 13969-13988 of 22924
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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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(2006)The reaction FeS2(cr) + 2Ag(cr) = 'FeS'(cr) + Ag2S(cr) was studied by measuring the temperature dependence of the electromotive force (EMF) of the all-solid-state galvanic cell with common gas space:(-) Pt | Ag | AgI | Ag2 ...
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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 ...
Now showing items 13969-13988 of 22924