312 Shepherd, RanJcin, Wright — binary Systems of 



Table ILL— Eutectic 3CaO . A1 2 3 + 5CaO . 3A1 2 3 . (Line T N M) 



Percentage 

 A1 2 3 



51 



50 



49 



48 



47 



46 



45 



44 



43 



42 



41 



37-78 



35 



31-29 



Eutectic 























melts 



1383° 



1383° 



1386° 



1386° 



1382° 



1387° 



1385° 



1384° 



1387° 



1384° 



1377° 



1377° 



1374° 



1380° 





83 



84 



80 



83 



85 



85 



81 



83 



86 



86 



84 



77 



75 



84 





84 



71 



81 



82 



82 



79 



80 



82 



81 



81 



76 



77 



77 



80 





83 



83 



81 



74 



84 



80 



81 



78 









75 









84 



78 



90 



86 





76 



79 



83 

















84 



81 



84 



81 





78 



83 



79 



















77 



80 



84 





79 



_. 



85 



















78 









76 



__ 



83 



















77 









87 





















;; 



78 









89 

 85 

 88 



















Mean 



1384 



1379 



1383 



1382 



1383 



1382 



1381 



1382 



1385 



1384 



1379 



1377* 



1375* 



1381* 



Eutectic points occurring beyond 37'78 composition, due to failure to reach equilibrium. 

 Table IV.— Eutectic CaO . A1 2 3 + 5CaO . 3A1 2 3 . (Line T O) 



Percentage of A1 2 3 



60 



59 



57 



56 



55 



54 



Eutectic melts 



1384° 



1388° 



1381° 



1388° 



1390° 



1384° 







86 



75 



82 



83 



81 







83 



78 



81 



80 



82 





. 



78 



78 



81 



80 



82 







83 



84 



81 



78 



86 







77 



89 



79 



83 



88 









:; 



79 



82 



88 



89 



80 









" 



78 

 79 



" 



" 



:: 



Mean 



1384 



1382 



1380 



1383 



1383 



1383 



Table V. — Melting Points. 



Percentage 

 of A1 2 3 



60 



57 



50 



46 



45 



44 



43 



42 



41 



37-78 



31-29 



Melts 



1473° 



1467° 



1458° 



1435 



1446° 



1430° 



1454° 



1455° 



1426° 



1427° 



1458° 





75 



77 



45 



39 u 



38 



29 



36 



51 



28 



23 



49 





63 



62 



53 



39 



24 



28 



34 



51 



21 



59 







-- 



58 



45- 



38 

 39 



30 

 24 



47 

 47 



38 

 36 



49 

















31 

 23 



20 



20 

 18 



29 



27 



40 















-_ 1 .. 

 < 





16 



.. 















Mean 



1470 1466 



1450 



1429 



1431 



1437 



1440 



1452 



1425 



1436 



1454 



