Abstract

The dissociation of several oxyanions: , , , , and in molten FLINAK has been studied potentiometrically with a stabilized zirconia electrode. The interaction of these melts with O2− has similarly been studied. All of these ions appear to be stable in FLINAK, but and take up O2− to form higher oxides, probably and , respectively. The behavior of the Pt electrode in these melts is quite complex. Its potential varies with ln[O2−], the slope being RT/F or larger. It is therefore not suitable as either reference or O2− indicator electrode.

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