Liquid–liquid equilibrium in the lithium–lanthanum system

Liquid–liquid equilibria in the Li–La system are studied experimentally.The study is conducted by a gamma-ray attenuation technique.The phase diagram of the Li–La system is refined.

The boundaries of the liquid–liquid immiscibility region on the phase diagram of the Li–La system have been determined by the gamma-ray attenuation technique. At the monotectic temperature (1118 K), the miscibility gap ranges from 0.25 to 92.9 at.% La. As the temperature increases, the solubility of the liquid metals in each other rises slightly.