THE DENSITY AND ELECTRIC CONDUCTANCE OF THE MOLTEN SYSTEM CERIUM—CERIUM CHLORIDE
| Autor: | G. W. Mellors, S. Senderoff |
|---|---|
| Rok vydání: | 1960 |
| Předmět: |
General Engineering
Analytical chemistry chemistry.chemical_element Conductivity Chloride Metal Cerium Ammonia chemistry.chemical_compound Molar volume chemistry Electrical resistivity and conductivity visual_art visual_art.visual_art_medium medicine Physical and Theoretical Chemistry Phase diagram medicine.drug |
| Zdroj: | The Journal of Physical Chemistry. 64:294-300 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100832a002 |
| Popis: | The density and electric conductance of the Ce-CeCl/sub 3/ system were measured from the pure salt to the almost saturated solution (8 mole% Ce) at 850, 900, and 950 deg C. The density of pure CeCl/sub 3/ is 3.216 g/cc at 850 deg . It decreases by about 1.5% on addition of 0.3 mole% Ce metal after which an almost linear increase to 3.287 g/cc at 8 mole% Ce is observed. The specific and equivalent conductances of pure CeCl/sub 3/ are 0.9600 ohm/sup -1/ cm/sup -1/ and 24.54 ohm/sup -1/ cm/sup 2/, respectively, at 850 deg . Large increases in these values (43 and 46%, respectively) are observed on the initial addition of Ce metal corresponding to a concentration of 0.63 mole%. Beyond this initial addition the conductivity rises slowly to values of 1.8900 ohm/sup -1/ cm/sup -1/ and 48.26 concentration of Ce on the density and conductivity of the system are explained by postulating the existence of comparatively free electrons resulting from the reaction y the reaction Ce/sup 3+/ + 2/sup e/ = Ce/sup 1+/. The comparatively free electrons in the systems dilute in Ce metal have large "molar volumes" and high mobilities as observed in Na-liquid ammonia systems.more » The electronic "molar volume" and mobility are reduced rapidly with increasing amounts of added cerium so that the conductivity mechanism at higher concentration becomes uncertain, although it is likely that even at the highest concentration there is still some component of electronic conductivity. (auth)« less |
| Databáze: | OpenAIRE |
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