Thermal methods of high precision were used to determine the solid-liquid phase equilibria diagrams for the potassium-rubidium and the rubidium-cesium systems. Both form minima in the liquidus curves occurring at 307.00° K with 0.667 mole fraction rubidium in the potassium-rubidium system and 282.85° K with 0.530 mole fraction cesium in the rubidium-cesium system. In the potassium-rubidium system, the liquidus and solidus points are very close together, giving a very narrow temperature range for the two phase region. The freezing point minimum in the potassium-rubidium system occurs at 0.667 mole fraction rubidium, suggesting the possible formation of a KRb2 intermetallic compound.
College and Department
Chemistry and Biochemistry
BYU ScholarsArchive Citation
Delawarde, Elisabeth M., "Solid-liquid phase equilibria of the potassium-rubidium and rubidium-cesium alloy systems" (1971). Theses and Dissertations. 8199.
Potassium, Rubidium, Cesium, Phase rule and equilibrium