Below 570 K the coefficient is lower than the values given by this equation because of vacancy ordering. The diffusion coefficient for sulfur is many orders of magnitude smaller than for iron. The significance of the data for the FeS 2 reaction and other examples of iron diffusion is discussed...
Temperature exhibits the largest influence on these kinetics at high sulfur pressures. An expression is derived for the parabolic rational rate constant in terms of the chemical diffusivity and nonstoichiometry of iron sulfide using the Wagner equation for scaling by iron diffusion and the Libowitz ...
however, that amines and carboxylic acid groups are sometimes substituted for one or more cysteinyl ligands; this alters the spectroscopic and thermodynamic properties of the iron–sulfur center. The Rieske iron–sulfur center, which functions
The P-V-T equation of state and thermodynamic properties of liquid iron. J. Geophys. Res. 119 (2014). 96. Umemoto, K. et al. Liquid iron-sulfur alloys at outer core conditions by first-principles calculations. Geophys. Res. Lett. 41, 2014GL061233 (2014). 97. Zhang, D. et al. ...
aEffects of temperature on the rates of iron and sulfur oxidation by selected bioleaching Bacteria and Archaea: Application of the Ratkowsky equation 温度的作用在铁和硫磺氧化作用的率由选择的bioleaching的细菌和Archaea : Ratkowsky等式的应用[translate]...
In this technique, bacteria directly interact with heavy metal–contaminated sites by attaching to the metal salts and cause dissolution of metals as explained by the following equation: (3.2)MS2+H2O+3.5O2→M2++2SO42−+2H+ where MS2is an insoluble metal sulfide and M2+is a freemetal ion....
The next chemical equation shows how the roasting process can also be used to drive water molecules off a hydrated iron(III) oxide complex: 2FeO3HO()2FeO()+3HO()232232⋅ssg Other impurities, such as sulfur and phosphorus elements, are oxidized during the roasting process. The following...
The EXAFS equation (Eq.1) was used to fit the experimental data usingN,So2,E0,R, and σ2as variable parameters (see fit results in Table1).Nrefers to the number of coordination atoms surrounding Fe in each shell. The quality of fit was evaluated by theR-factor and the reducedχ2value...
However, it is evident that the application of the “classical” method, that is, the exclusive use of the Nernst equation for a preselected stoichiometric reaction, permits no comprehensive understanding of the equilibrium state of a complex multi-component system. View chapterExplore book ...
(~40 GPa)2,8based on thermodynamical equation of state. We found that sulfur have little effect on theVPof liquid iron in the Mars’ whole core pressure range as opposite to the case for the core of the Moon (~5 GPa)6. It is therefore difficult to estimate sulfur content of ...