Equilibrios al estado sólido entre frases de solución sólida en sistemas minerales binarios: Sistema RbBr-RbI

X-ray diffraction has been used to study the de equilimixtion in solid state of Rb(BrXIi..) solid solutions The compositions of the phases in equilibrium at room temnerature are 0.18 RbBr-0.82 RbI and 0.96 RbBr-0.04 ÉZb1, respectively. The maximum critical  temperature of the demixtion is 422ºC, corresponding to the composition X~t.1= 0.35. AS a result of this experimental work the existente of a  single-phase region at high-temperature and a two-phases region at interdifracmediate and  low-temperature has been established

Equilibrios al estado sólido entre frases de solución sólida en sistemas minerales binarios: Sistema RbBr-RbI

X-ray diffraction has been used to study the de equilimixtion in solid state of Rb(BrXIi..) solid solutions The compositions of the phases in equilibrium at room temnerature are 0.18 RbBr-0.82 RbI and 0.96 RbBr-0.04 ÉZb1, respectively. The maximum critical  temperature of the demixtion is 422ºC, corresponding to the composition X~t.1= 0.35. AS a result of this experimental work the existente of a  single-phase region at high-temperature and a two-phases region at interdifracmediate and  low-temperature has been established

Interdiffusion between sodium chloride and potassium chloride

L'interdiffusion dans le système NaCl-KCl a été étudiée entre monocristaux et/ou polycristaux, dans la gamme de température 485-640 °C. Les courbes de pénétration ont été obtenues par analyse à la microsonde électronique. Les variations des coefficients d'interdiffusion [MAHT] en fonction de la concentration sont données pour T variant de 600 à 640 °C. Par ailleurs, il apparaît que l'interdiffusion permet la formation de phases métastables dans le cas de non-miscibilité totale. Le phénomène d'effet Kirkendall a été mis en évidence et évalué.Interdiffusion has been investigated in the NaCl-KCl system, over the temperature range 485-640 °C. Experiments have been carried out on single crystals and/or polycrystalline samples. Penetration profiles have been determined by the electron microprobe technique. The values of the interdiffusion coefficient [MATH] versus concentration and temperature (600-640 °C) are given. When studied in the temperature range of the demixtion phenomenon (T < 500 °C), the interdiffusion leads to a miscibility gap slightly smaller than those observed by the equilibrium methods. The existence of a Kirkendall effect in this system has been proved and studied

DEBYE SPECTROMETRY CONTRIBUTION FOR STUDY OF SO4CA-H2O SYSTEM

no abstrac

DEBYE SPECTROMETRY CONTRIBUTION FOR STUDY OF SO4CA-H2O SYSTEM

no abstrac

DESHYDRATATION STUDIES IN SOME CRYSTALLIZED SUBSTANCES BY DEBYE DIPOLAR ABSORPTION

no abstrac

DEBYE SPECTROMETRY CONTRIBUTION FOR STUDY OF SO4CA-H2O SYSTEM

no abstrac