Studies of Lithium Hydride Systems. II. Solid—Liquid Equilibrium in the Sodium Chloride—Lithium Hydride System

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Abstract
Thermal analysis has been used to determine the temperature—composition solid—liquid equilibrium diagram for the lithium hydride—sodium chloride reciprocal system. A eutectic composition of 55.2 mole % lithium hydride was observed, melting at 565.7°C. No evidence for the formation of solid solutions was observed. The values of chemical potential of each component have been calculated along the equilibrium curves where the solutions are saturated with respect to the pure solids. The limiting slopes of the saturation curves are consistent with the interpretation that sodium chloride exists primarily as an un‐ionized monomer when dissolved in lithium hydride and that lithium hydride also exists primarily as an un‐ionized monomer when dissolved in sodium chloride.

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