Notizen: Volume Changes on Melting for Several Rare Earth Chlorides

Abstract

Molar volumes in the liquid state and melting points of several rare earth chlorides RCl 3 (R = La, Pr, Nd, Gd, Dy, and Y) have been measured by dilatometry and DTA. respectively. The volume changes on melting of these chlorides were evaluated on the basis of these result and available crystal structure data. The volume increase on melting of the hexagonal chlorides from LaCl 3 to GdCl 3 was found to be more than 20%. On the other hand, the volume changes of the monoclinic DyCl 3 and YCl 3 were less than 1%.