Фазовая диаграмма системы Eu-W

К оглавлению: Другие диаграммы (Others phase diargams)


Eu-W (Europium-Tungsten) S. Pandian, S.V. Nagender Naidu, and P. Rama Rao A partial phase diagram for the Eu-W system is shown. The maximum solubility of W in (Eu) reported by [66Den] is 0.0019 at.% at 1612 C. Most of the data points of [66Den] are found to be above the boiling point of Eu (1597 C). Among the lighter RE-W systems, this is the only system for which the solubility data are heavily scattered, probably because the data correspond to the vapor state of Eu. [76Mie] reported no stable compounds in the Eu-W system, because the predicted enthalpy of formation for both Eu3+W and Eu2+W is positive at all concentrations of Eu. 66Den: D.H. Dennison, M.J. Tschetter, and K.A. Gschneidner, Jr., J. Less- Common Met., 11, 423-435 (1966). 76Mie: A.R. Miedema, J. Less-Common Met., 46, 167-173 (1976). Published in J. Alloy Phase Diagrams, 4(2), May 1988. Complete evaluation contains 1 figure, 3 tables, and 2 references. 1