172 A. L. DAY MINERAL RELATIONS FROM LABORATORY VIEWPOINT 

















































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1510° 



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1210° 



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10 20 30 40 50 RO 70 80 90 IOC 



CaSiOs. MgSiOa. 



Figure 7. — Diagram showing the Relation hetiveen Calcium Metasilicate and Magnesium 

 Metasilicate when mixed in any Proportion at any Temperat^tre 



Principal Areas of the Diagram 



9. 



AHB a-CaSiOg + liquid. 



BIC Diopside + liquid. 



HIMO a-CaSiOg + diopside. 



OPQM ^-CaSiOg + diopside. 



KOPL Mix-crystals diopside in ^-CaSiOg. 



CTUSR Mix-crystals of MgSiOg in diopside. 



CDT Mix-crystals of varying composition + liquid. 



DEV a-MgSiOg -f liquid. 



TUXV a-MgSiO, + diopside mix-crystals. 



10. UXYS )S-MgSiO, + diopside mix-crystals. 



