Rankin and Wright — Ternary System CaO-Al^O % -Si0 2 . 77 



B. Binary Eutectics — Melting Points. 



Crystalline 

 Phases 



Weight percentage 

 CaO Al 2 O s Si0 2 



Temp. 



aCaO.SiO, ) 





37' 





63- 



1436°± 5° 



aCaO.Si0 2 ) 

 3Ca0.2Si0 2 j 





54-5 





45-5 



1455°± 5° 



a2CaO.Si0 2 ) 

 CaO f 





67-5 





32-5 



2065°±10° 



3CaO.Al 2 3 ) 

 5Ca0.3Al 2 3 f 





50' 



50* 





1395°zh 5° 



5Ca0.3Al 2 3 ) 

 CaO.Al 2 3 j 





47' 



53' 





1400°^ 5° 



CaO.Al 2 3 ) 

 3Ca0.5Al 2 U j" 





33-5 



66-5 





1590°^ 5° 



3Ca0.5ALO, ) 

 A1 2 3 j" 





24- 



76- 





1700°±10° 



Al 2 3 .Si0 2 | 

 Si0 2 \ 







13* 



87- 



leio^io 



Al 2 3 .Si0 2 \ 

 A1 2 3 f 







64- 



36- 



isio^io 



CaO Al 2 3 .2Si0 2 

 aCaO.SiO, 



f 



34-1 



18-6 



47*3 



1299°± 5° 



CaO.Al 2 3 .2Si0 2 

 Si0 2 



[ 



10-5 



19'5 



70- 



1359°± 5° 



2CaO.Al 2 O s .Si0 2 

 a2CaO.Si0 2 



I 



49-6 



23-7 



26-7 



1545°db 5° 



CaO.Al 2 3 .2Si0 2 

 A1 2 3 



s 



19-3 



39*3 



41-4 



1547°db 5° 



2CaO.Al 2 3 .Si0 2 

 CaO.Al 2 3 



1 



37-8 



52-9 



9-3 



1512°± 5° 



2CaO.Al 2 O a .Si0 2 

 3Ca0.5Al 2 3 



} 



35* 



50'8 



14-2 



1552°^ 5° 



CaO.Al 2 3 .2SiO a 

 2CaO.Al 2 3 .Si0 2 



;l 



30*2 



36-8 



33- 



1385°± 5° 



2CaO.Al 2 3 .Si0 2 

 aCaO.Si0 2 



1 



45*7 



13-2 



41-1 



1316°^ 5° 



02CaO.SiO 2 ) 

 5Ca0.3Al 2 3 j" 





51-3 



41-8 



6*9 



1350°^ 5° 



