Thermodynamic investigation of the LiF-ThF4 system
A thermodynamic investigation of the LiF-ThF4 system is presented in this study. The enthalpy
of mixing of the (Li,Th)Fx liquid solution was measured for the first time using a method
designed for conventional DSC technique. To verify the possibility to measure the mixing enthalpy
with the used calorimeter, the known LiF-KF system was first investigated and compared to the
literature data. After the successful test, this technique was applied to investigate the
LiF-ThF4 system and obtained novel results are presented in this study. Furthermore, using the
DSC technique, new equilibrium data of the LiF-ThF4 phase diagram were measured, confirming
the stability of the LiThF5 phase. The intermediate compound Li3ThF7 was synthesized and
its enthalpy of fusion was determined. Considering the new experimental data, the LiF-ThF4
system was re-optimized using quasi chemical model for the description of excess Gibbs parameters
of the liquid solution.
CAPELLI Elisa;
BENES Ondrej;
BEILMANN Markus;
KONINGS Rudy;
2013-04-11
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
JRC71965
0021-9614,
http://www.sciencedirect.com/science/article/pii/S0021961412003990,
https://publications.jrc.ec.europa.eu/repository/handle/JRC71965,
10.1016/j.jct.2012.10.013,
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