Thermodynamic properties of lanthanum in gallium-indium eutectic based alloys

Activity and activity coefficients of lanthanum were determined for the first time in gallium-indium eutectic based alloys in a wide temperature range employing electromotive force method. Activity of β-La and super cooled liquid lanthanum in Ga-In eutectic based alloys between 573 and 1073 K linearly depends on the reciprocal temperature: lgaβ-La(Ga-In)=5.660-15, 352T±0.093 lgaLa(Ga-In)=6.074-15,839T±0.093 Activity coefficients of β-La and super cooled liquid lanthanum in this system at 617-1073 K are described by the following equations: lgγβ-La (Ga-In)=3.786-12,216T±0.171 lgγLa(Ga-In)=4. 199-12,703T±0.171 In addition activity of lanthanum in alloys with In was also determined in the same temperature range. © 2012 Elsevier B.V. All rights reserved

DETERMINATION OF THE THERMODYNAMIC CHARACTERISTICS OF CERIUM IN (Li-K-Cs)Cl

In this work, the equilibrium potentials of Ce were determined by the method of quasi-stationary potentiometric measurements relative to the silver chloride reference electrode in an equimol mixture of lithium, potassium and caesium chlorides in the temperature range of 799-973 K

THE STUDY OF STATICS OF STRONTIUM SORPTION BY NATURAL AND MODIFIED ALUMINOSILICATES

Statics of strontium sorption from low mineralized waters by sorbents based on natural and modified aluminosilicates was studied. It was found that distribution coefficients of strontium for natural and modified clinoptilolites are higher than for glauconites. Static exchange capacities were determined for all sorbents

Research and Development of the pyrochemical processing for the mixed nitride uranium-plutonium fuel

A mixed nitride U-Pu SNF pyrochemical reprocessing technology was suggested. It includes the following basic operations: dissolution of key components using the CdCl2 or PbCl2 oxidizer in chloride melt and their subsequent deposition as oxides. The obtained product, which is a mixture of actinides and rare-earth metals, may be additionally purified using hydrometallurgical processes (combined technology) or using pyrochemical methods. The mixture of actinides oxides is reduced to metal ("metallization"), additionally purified from fission products during electrorefining and then Am and Cm are separated using the potentiostatic electrolysis in order to obtain products that may be used for pure fuel fabrication. © 2020 IOP Publishing Ltd. All rights reserved

THE STUDY OF STATICS OF STRONTIUM SORPTION BY NATURAL AND MODIFIED ALUMINOSILICATES

Statics of strontium sorption from low mineralized waters by sorbents based on natural and modified aluminosilicates was studied. It was found that distribution coefficients of strontium for natural and modified clinoptilolites are higher than for glauconites. Static exchange capacities were determined for all sorbents

EQUILIBRIUM POTENTIALS OF GADOLINIUM, HOLMIUM AND ERBIUM IN LITHIUM-POTASSIUM-CESIUM CHLORIDE EUTECTIC MELT

Formal standard electrode potentials of gadolinium, holmium and erbium were determined in (Li-K-Cs)Cl eutectic melt between 668-1013 К employing quasi-stationary potentiometric measurements. EMF was measured vs. chloride reference electrode. In addition, the enthalpy of mixing REE chlorides with the solvent melt was estimated

THERMODYNAMIC PROPERTIES OF NEODYMIUM IN GALLIUM-ZINC EUTECTIC ALLOY

Thermodynamic properties of neodymium were determined in gallium–zinc eutect alloy. The electromotive force measurements were used to determine thermodynamic activity

LANTHANUM SOLUBILITY IN GALLIUM-ALUMINUM LIQUID ALLOYS

Solubility of lanthanum was determined in gallium-aluminum alloys containing 5 and 20 wt.% aluminum between 428-1005 K using methods of sedimentation and filtration

Influence of Precipitation Parameters on Particle Size of Neodymium Fluoride during Controlled Double-Jet Precipitation

Influence of equilibrium concentration of fluoride ions, concentration of ammonium chloride, stirring velocity, pH value and starting volume on forming process of neodymium fluoride was studied. Sedimentation size of neodymium fluoride particles was determined by laser diffraction

STUDY OF THE EFFECT OF PRECIPITATION PF ON THE PROPERTIES OF CERIUM FLUORIDE PARTICLES

Cerium fluoride particles have been synthesized by controlled double-jet precipitation method. Exploring of precipitation pF gives rise to control granulometric composition of the particles. Sedimentation size of cerium fluoride particles have been determined using laser diffraction method