LiClKCl
LiClKCl is a eutectic mixture of lithium chloride (LiCl) and potassium chloride (KCl). A eutectic mixture is a specific composition of two or more components that melts at a single temperature, which is lower than the melting point of any of the individual components. In the case of LiClKCl, the eutectic composition is approximately 58.5 mole percent LiCl and 41.5 mole percent KCl. This mixture melts at a relatively low temperature of around 352 degrees Celsius (666 degrees Fahrenheit).
This eutectic salt mixture finds applications primarily as a molten salt electrolyte. Its low melting point