Rankin and Wright — Ternary System CaO-Alfi^-SiO^ 41 



As can be seen from the three photographs, the concentra- 

 tion-temperature model of the ternary system CaO-Al 2 3 -Si0 2 

 has the general appearance of a mountain range ; the mountain 



Fig. 9. 





■■cToJI 



^^^1 \ 









i^l- : -^ w 





■ ^H . ^T 



A,"v ' '. •. " - 



^■■1 w 





V'^P^^ 



■ 



H^ 



Jty~i 



Hk ' ""■■ ^£8m 



Jm 



^^ .,y-- 





^ ^m 





k 





. ^^L 





'■^^ s,o, I 





US ^ ~ Jl 





•,m JH1 





^.•.--^ mj?:.- 





Fig. 9. Photograph of solid model of concentration-temperature diagram 

 of ternary system ; showing relation of binary systems CaO-Si0 2 and 

 Al 2 3 -Si0 2 to the ternary system. 



peaks are melting points of components or of compounds stable 

 at the melting point ; the continuous slopes on the sides of each 

 mountain represent the melting temperatures of a stable com- 



