Ionic mobilities of monovalent cations in molten salt mixtures

Chemla, M.; Okada, Isao

doi:10.1016/0013-4686(90)87077-f

Cited by 49 publications

(56 citation statements)

References 63 publications

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“…This tendency is similar to that in molten (K, Ca 1/2 )C1 [8,14], It has previously been found that in molten binary alkali nitrates, the internal mobilities b x of cation 1 are well expressed by the empirical equation [15] …”

Section: Internal Mobility Of K +supporting

confidence: 80%

Internal Cation Mobilities in Molten (K, Dy_1/3)Cl

Matsuura

Okada

Takagi

et al. 1998

Zeitschrift Für Naturforschung A

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Internal cation mobility ratios in the molten system KCl-DyCl 3 have been measured at 1093 K by Klemm's countercurrent electromigration method. From these, and data available on the conductivities and molar volumes of the mixtures, the internal mobilities b of both cations have been calculated. With increasing concentration of Dy, b K decreases. The decrease of b K is attributed to the tranquilization effect by Dy 3+ ions which strongly interact with Cl~ ions. With increasing concentration of K + , b Dy decreases; this may be attributed to the stronger association of Dy 3+ with CP ions due to the enhanced charge asymmetry of the two cations neighboring to the CP ions. It could not been clarified whether a species such as [DyCl 6 ] 3_ is also an electrically-conducting species in the K + rich range.

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Section: Internal Mobility Of K +supporting

confidence: 80%

Internal Cation Mobilities in Molten (K, Dy_1/3)Cl

Matsuura

Okada

Takagi

et al. 1998

Zeitschrift Für Naturforschung A

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“…The reason is discussed there in detail. Also in molten binary alkali nitrates, the mobilities follow (2) rather well [33].…”

Section: Introductionmentioning

confidence: 84%

“…There are ten combinations of binary alkali nitrates (from Li to Cs), among which only in (Li, Na)NO 3 the larger cation is always more mobile than the smaller one [33,36], i.e., the Chemla crossing point does not exist under accessible conditions at ambient pressure. The case is similar in (Li, Na)Cl [65] and (Li, Na)(CO 3 ) 1/2 [66]; but in (Li, Na)Br, a Chemla crossing point appears [26] .…”

Section: Mobility Order Ofmentioning

confidence: 99%

“…Since the elementary separation factor is small, one could not highly enrich 39 3 , and the isotherms of the mobilities of (Li, M)NO 3 (M = K, Rb, and Tl) are similar in that at high concentration of LiNO 3 , Li + is more mobile than M, and that the Chemla effect occurs [33].…”

Section: Possibility Of Enriching Lighter Cationic Isotope Such As 39mentioning

confidence: 99%

“…As the Chemla effect has played a key role for the interpretation of the mechanism of electrolytic transport mechanism in molten salts [33,34], the Klemm method, useful for accurate measurement of (cation) mobilities in mixtures, has seen its area of application much extended. For example, the dynamic dissociation model has been proposed based on a wealth of data obtained by the Klemm method, again mainly for binary mixtures with a common anion [35 -39].…”

Section: Introductionmentioning

confidence: 99%

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High Enrichment of ⁶Li in Molten Nitrates by the Klemm Method

Okada¹,

Nomura²,

Haibara³

2013

Zeitschrift Für Naturforschung A

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The Klemm method of isotopic enrichment (countercurrent electromigration of molten salts) and many of its implications are reviewed and discussed. On the basis of this principle, a small amount of 6 Li was enriched in some experiments from its original abundance, 7.6%, to 94.9% at about 300 • C. The variation of the conditions led to a modified setup where, by disposing a small amount of NaNO 3 between the catholyte ( NH 4 NO 3 ) and the zone of LiNO 3 , the frontal part, where 6 Li is to be enriched, could be kept stable under high current density for more than one month without any problem of corrosion. The reasons and implications of this new step are discussed, underlining the up-to-dateness of Klemm's experiment.

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