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The surface tension of the molten system LiF-NaF-K 2 NbF 7  has been determined using the maximum bubble pressure method. The error in the surface tension measurement was estimated to be ±1%. Based on the obtained data the composition dependence of the surface tension and of the surface tension excess of the investigated system was calculated. The results are discussed in term of the anionic composition. From the surface tension excess results the negative deviation from the ideal behavior of the studied system.

Surface Tension of the System LiF-NaF-K 2 NbF 7