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Browsing Геология России by Title
Now showing items 16697-16716 of 40116
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(1998)Molecular hydrogen plays a central role in bacterially mediated anoxic sediment chemistry, as both an important electron transfer agent and a key thermodynamic control. We studied the response of hydrogen concentrations ...
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(2001)The universe is an isolated system with constant mass-energy. The second law of thermodynamics requires that its entropy must increase over time-that is, the universe is irreversible-yet modern cosmological models presume ...
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(1987)A method is presented for determining the thermodynamic effect of the separation which makes it possible to analyze each system as a whole and to plot the change in free energy produced by separation into immiscible phases. ...
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(1997)The technique of using noble metal alloys as redox sensors has been adapted for use in hydrothermal experiments in the piston-cylinder apparatus at the reduced conditions of the iron-wustite (IW) buffer. The required high ...
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(1997)We derived a thermodynamic dataset for the phases in the CaSiO3 system including the wollastonite polymorphs (wollastonite-I, wollastonite-II, and pseudowollastonite), larnite (β-Ca2SiO4), CaSi2O5 (titanite-like), CaSiO3 ...
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(2000)Activities of CoO in (Co,Mn)O solid solutions in contact with metallic Co have been determined on ten compositions ranging from 0.12 to 0.84 XCoO in order to calibrate the divariant equilibrium between (Co,Mn)O oxide ...
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(2002)The enthalpy of drop-solution in molten 2PbO·B2O3 of synthetic and natural lawsonite, CaAl2(Si2O7)(OH)2·H2O, was measured by high-temperature oxide melt calorimetry. The enthalpy of formation determined for the synthetic ...
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(2001)The enthalpy of drop-solution in molten 2PbO·B2O3 of synthetic and natural lawsonite, CaAl2(Si2O7)(OH)2·H2O, was measured by high-temperature oxide melt calorimetry. The enthalpy of formation determined for the synthetic ...
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(2001)Calorimetric and P–V–T data for the high-pressure phase Mg5Al5Si6O21(OH)7 (Mg-sursassite) have been obtained. The enthalpy of drop solution of three different samples was measured by high-temperature oxide melt calorimetry ...
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(2003)A new, virial-like equation of state (EoS) for describing the thermodynamic properties of aqueous nonelectrolytes at infinite dilution is proposed. It is based on the accurate EoS for a solvent (H2O) given by Hill (1990) ...
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(2001)The available experimental data on the stability constants of chloride, hydrosulfide, and hydroxo complexes of Ag(l), Cu(l), and Au(l) under hydrothermal conditions were processed. ne procedure employed the Helgeson-Kirk ...
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(1999)A new method for computing complicated equilibria in hydrothermal mixed fluids, H2O-non-polar gas, is proposed. The computation algorithm is based on the electrostatic approach for the interaction between aqueous species ...
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(2000)A simple numerical model for simultaneous optimization of heat capacity at constant pressure, C(P), heat capacity at constant volume, C(V), volume, V, thermal expansion coefficient, α, isothermal, K(T), and adiabatic, K(S), ...
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(2000)An extensive compilation of experimental data yielding the infinite dilution partial molar Gibbs energy of hydration ΔhGO, enthalpy of hydration ΔhHO, heat capacity of hydration ΔhCpO, and volume V2O, at the reference ...
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(1996)Enthalpies of solution have been measured on a series of muscovite—paragonite micas in 20.1% HF at 50°C under isoperibolic conditions. The molar enthalpy of formation of paragonite at 298 K, for which no calorimetrically ...
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(1986)Reversed Na-K exchange data between mica and a 2 molal aqueous (Na,K)Cl fluid (Flux & Chatterjee, 1986) have been employed to model the thermodynamic mixing behaviour of muscovite-paragonite crystalline solutions on the ...
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(2004)Enthalpies of solution have been measured for synthetic glasses in the SiO2–Na2O system from 0 to 50 mol% Na2O. The positive enthalpies of mixing determined for the compositional range between 0 and 33.3 mol% Na2O, combined ...
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(2004)This paper presents the results of calculations of binary and ternary parameters of the Pitzer equation and the thermodynamic potentials of solid phases crystallizing in the water-salt systems that model chloride brines ...
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(1999)A new approach to formulating and solving thermodynamic-modeling problems by the Gibbs-energy minimization under uncertainty of input information has been proposed. The proposed approach is as follows: 1. The effect of the ...
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(2004)Inclusions of quenched silicate liquid in igneous phenocryst phases represent important windows into the pre-eruption chemistry of volcanic rocks. Melt inclusions are subject to a variety of potential modifications after ...
Now showing items 16697-16716 of 40116