to Calcium and Magnesium Metasilicates. 9 



Fig. 1. 

















































A 







































y/i 



E 



1510° 



t\ 











































1480° 



; « 



\ 









































I ' 



\ 































f 









1450° 





\ 













































\ 



V 





































1420° 









\ 























/ 





















\ 























/ 



i 





8 









1390° 











\ 





















/ 



















i 





\ 











C 









yPl, 













v\ 















\ 



\ 













7 





•r 



o 



i 



I 9 







xy 



W 



~ 1360° 



<U c 



!> « 



3 















xH 









o 



V 



/ 



2 



I 















































S 1330° 



; 1 









B 







i 



























I /* 









































1300° 





i 





















6 

































3 

































4270° 



\ 

































/0 





















































1240° 























































































1240° 























































































4480° 



K^ \ 



— - 



.__ 



--- 



■-- 



-- 





. .11 





























5 V 



i 







4 



































44-50° 



L 

















Q 



R 









Is 













y\ 



z 



40 

 CaSiOs 



60 



Concentration'. 

 Principal Areas of the Diagram. 



AHB a-CaSi0 3 + liquid. 



B1C Diopside + liquid. 



HIMO a-CaSiOs + diopside. 



OPQM ,3-CaSi0 3 + diopside. 



KOPL Mix-crystals diopside in ,3-CaSi0 3 . 



CTUSR Mix-crystals of MgSi0 3 in diopside. 



CDT Mix-crystals of varying composition + liquid. 



DE\T a-MgSiOa + liquid. 



TUXV a-MgSi0 3 + diopside mix-crystals. 



UXYS ,3-MgSiC) 3 + diopside mix-crystals. 



90 100 



MgSiOs. 



