Equilibrium dissociation pressures of lithium hydride and lithium deuteride. [450 to 750/sup 0/C]

Thermodynamic Properties of Li-LiH (LiD, LiT) Systems. The Phase Diagram

“…A consistent analysis of Smith and Webb [13] data for the Li-LiH (LiD) systems near temperatures of ±100 K relative to T M in the form of the relation…”

“…The temperature of the monotectic T M of the Li-LiH system was determined for the first time by M by the thermographic m 1˚C obtained by them, h as was indicated in the subsequent experiments, e.g., by Smith and Webb [13]. Analysis of the behavior of the pressure isotherm in the Li-LiH system, when the condensed phase is in equilibrium with the vapor, as a function of the composition of the condensed phase, shows that in the temperature region of the monotectic the isotherm plotted as In the temperature region slightly above T M , the vapor phase and the two liquid phases are in equilibrium, whereas in the temperature region slightly below T My the vapor phase, the liquid phases and the solid phase are in equilibrium action cond cond 2 gas…”

“…Smith and Webb [13] and Veleckis [15] also determined the temperatures of the monotectic in Li-LiH (LiD, LiT) systems by analyzing their data on the vapor pressure in the plane region over a broad temperature range. However, the values ob are enclosed in parentheses), T M = 694˚C (699.6˚C) for Li-LiH, T M = 690˚C (687.7˚C) for Li-LiD, and T M = 688˚C for Li-LiT, do not seem to be legitimate princeipally because of their isotopic sequence.…”