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PROPERTIES OF MANGANESE DIOXIDES
k Thermodynamic Stabilities of Manganese Oxides
DESIGN OF THE INVESTIGATION PROCEDURE
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75°C and initial Analyses of solutions aqueous solutions Arrhenius Equation average oxidation calculated chemical analyses cobalt concentrations copper cryptomelane Crystal Structure dissolution electron microscope picture energies of formation equilibrium experiment at 75°C experimental extraction rates extraction reactions feed material Hoover and Fuerstenau hours of leaching impurities increase initial pH kcal/mole large cations leaching behavior manganese dioxides manganese ions manganese nodules manganites manganous manganites metal ions micron Mn(lV MnOx nickel O.k micron observed onset of phase oxide-hydroxides oxygen p-MnO peak phase change picture of solids potassium pre-exponential factors Pyrolusite quartz reaction mechanism reflection represents about O.k Scale represents Scanning electron microscope selective leaching solid samples solids after leaching solids during leaching solutions for experiment specific surface area stability field diagram Stability relations standard free energies surface area measurements synthetic temperature thermodynamic tion Transmission electron microscope Turkish Armed Forces x-ray diffraction patterns y-MnO