Freezing and eutectic temperatures were determined for the NaF‐KF‐K2NbF7 ternary system and the NaF‐K2NbF7, KFK2NbF7, and NaF‐KF binary systems. The compound KF‐K2NbF7 freezes congruently at 770°C; eutectics occur at 708° and 724°C for high‐ and low‐K2NbF7 mixtures, respectively. The NaF‐K2NbF7 eutectic freezes at 658°C. The ternary system has two eutectics, a high‐KF mixture and a high‐K2NbF7 mixture, which occur at 663° and 652°C, respectively.

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The electrodeposition of coatings of molybdenum from a sodium and lithium metaborate‐molybdate‐molybdenum oxide fused salt system was investigated. Coatings up to 16 mils thick were deposited on Inconel, Carpenter 20 stainless steel, nickel, copper, and graphite at current densities of 3.1–6.2A dm−2 (0.2–0.4A in.−2) and 900°C under an argon atmosphere. The composition of the electrolyte is critical; deposits are obtained only when the electrolyte contains between 1.0 and 3.3% molybdenum.

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