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3.2 CeCl3-LiCl System The excess molar Gibbs free energies of mixing at different compositions for CeCl,-LiCl binary system at To=1098K bave been measured using e.m.f. method by Egan et al.1.The G expression as follows was simulated by least square regression analysis using subregular solution model eG.,r。=Xcc1,(1-Xcc1,)(-12895.7+5569.2Xcec1,) J/mol S.could be estimated as follows from theG.values and our reliable measured phase diagram data using subregular solution model S.=Xcc1,(1-Xcc1,)(12.16-26.8Xcc1,) J/mol.K Thus,the G.at temperature T will be obtained. The calculated phase diagram of CeCl,-LiCl is in good agreement with our measured one shown in Fig.1. 3.3 LaCls-LICI System The integral enthalpies of mixing H for the LaCl,-LiCl binary system has been determined calorimetrically by Papatheodorou and Ostvold [ H=XLc1,(1-Xc1,)(-9623,7+418Xzc1, J/mol From the H values and our reliable measured phase diagram data "S.could be estimated. S.=Xzc,(1-Xc1,)(0.4065+13.155Xc1,) J/molK As shown in Fig.2.,the calculated phase diagram of LaCla-LiCl agreed well with our measured one. REFERENCES 1 Chai Liang,Zheng Chaogui.Proceedings of Fifth Symposfum on Phase Diagrams,The Chinese Physical Soclety,Wuhan,1977,Vol.3 2 Qiao Zhiyu,Sangester J,Pelton A D.CHLPHAD,1987;11(2):277 3 Qiao Zhiyu,Wang Mingsheng,Zheng Chaogui,Duan Shuzhen.Acta Metallurgical Silica,1989;25 (4):B234 4 Su Mianzeng.Li Peigen.HUAXUE TONGBAO (Chemistry),1964 4 34 5 Barin I,Knacke O,Kubaschewski O.Thermodynamical Properties of Inorganic Substance and Supplement,Springer-verlag,N.Y.1973,1977 6 Morozov I S,Shevtsova Z N.Zhur.Neorg.Khim.,1957;(2):1640 7 Blachnik R,Alberts G.Thermochimica Acta,19831 64:317 602。 亡 一 心 , 一 二 一 · · · 君 ‘ , 一 一 · · · 一 £ · 二 万 一 。 。 一 。 一 一 · 。 。 一 · , 君 “ · 。 一 一 心 丫 留 一 ‘ 份 。 一 。 , 一 。 一 二 , 。 一 凡 一 凡 。 , 瓜 。 二 · 一 , 一 。 , 一 , 了 夕, 夕 ‘ “ 二 。 夕 , 了 , , , 。 , , 。 万 , 住 , , , 五 。 万 。 “ 夕‘ ‘ , , , , ‘ · , , , 了 一 , 一 一 , , 。 夕 成 , , , 巾 而 用 ,
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