13 Hansen,M.,Constitutions of Binary Alloys,2nd ed.,McGraw-Hill,1958,p.167．
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20 Hultgren,R.;Desai,P.D.;Hawkins,D.T.;Gleiser,M.;Kelley,K.K.;Wagman,D.D.,Selected Values of the Thermodynamic Properties of the Elements.ASM Metals Park,Ohio,1973．
