78 Rankin and Wright — Ternary System CaO-Alfi % -8iO v 



C. Quadruple Points other than Eutectics. 



Crystalline Weight percentage 



Phases CaO Al a 3 Si0 2 



CaO 

 3CaO.Al 



D. Ternary Eutectics — Melting Points. 



Crystalline Weight percentage 



Phases C aO A1,0 3 SiO a 



CaO.Al 2 3 .2Si0 2 



2 3' 



Temp. 



f 2 C 0a°O 2 s!8: f 55 ' 5 4i ' 5 1475 °± 5 ° 



j- 57- 43' I535 zh^° 



Temp. 



CaO.Al 2 3 .2SiO, 



Si0 o 23-25 14-75 62* 1170°±5° 



aCaO.Si0 2 



CaO.Al 2 3 .2Si0 2 ) 



Al 2 3 .Si0 2 [ 9-8 19-8 70-4 1345°±5° 



Si0 2 ) 



2CaO.Al 2 3 .Si0 2 ) 



3Ca0.2Si0 2 [ 47-2 11-8 41* 1310°±5° 



aCaO.Si0 2 ) 



2CaO.Al 2 3 .Si0 2 ) 



CaO.Al.O, V 37-5 53'25 9'25 1505°±5° 



3Ca0.5Al 2 3 ) 



CaO.Al 2 3 .2Si0 2 ) 



2CaO.Al 2 3 .Si0 2 [ 38* 20' 42* 1265°±5° 



aCaO.Si6„ 



O i fO 



2CaO.Al 0„.Si0 V 29'2 39- 31 "8 1380°±5 



A1 2 3 



/32CaO.Si0 2 



CaO.Al 2 3 



5Ca0.3Al 2 £ 



/32CaO.Si0 2 



3CaO.Al 2 3 1335°±5' 



5Ca0.3Al O 



