Andersen — System Anorthite- For sterite- Silica. 415 



Table 5. 

 The System Anorthite-Enstatite. 



Composition in weight per cent. 



15 9 



a n 







Compo- 

 nents in 

 binary 

 system 



1 

 Components in 



ternary system 



Oxides 



Results 



An 



En 



10 



20 



An 



Fo 



7 

 14 

 21 



Si0 2 



3 

 6 

 9 



Si0 2 



Al a 3 



CaO 



MgO 





90 



90 



i 

 80 



70 



44-91 



32-99 



18-09 



4-01 



1489 

 1494 



1437 

 1443 

 1373 

 1377 

 1319 

 1325 

 1306 

 1309 

 1302 

 1306 

 1315 

 1320 

 1338 

 1343 

 1358 

 1364 

 1390 

 1398 

 1415 

 1423 



1437 

 1443 

 1465 

 1472 

 1506 

 1510 

 1542 

 1546 



i 



i 



i 



2" 



i 



Gl & An 

 Gl onlv 



80 



46-59 



29-32 



16-08 



8-01 



Gl & An 

 Gl only 



70 



30 



48-25 



25-66 



14-07 



12-02 



l 

 l 



Gl & An 

 Gl only 



62 



38 



40 



42 

 45 



50 

 55 

 60 

 65 : 



80 J 



90 

 1 



62 



26-6 



11-4 



12 



12-6 



13*5 



15 



16-5 



18 



19'5 



49-59 



22-72 



12-46 



15-23 



i 



1 

 "2F 



Gl & An 

 Gl only 



60 



60 



58 



55 



50 



^5~ 



28 



29-4 

 31-5 

 35 

 38-5 



49-92 



21-99 



12-06 



16-03 



i 

 i 



Gl & An 

 Gl only 



i 



1 

 "2 



Gl, An & Fo 

 Gl & An 



58 



50-25 



21-26 



11-66 



16-83 



1 

 ¥ 

 l 

 2 



Gl &Fo 

 Gl only 



55 



50-76 



20-16 



11-05 



18-03 



1 



i 



Gl &Fo 

 Gl only 



50 



51*59 



18-32 



10-05 



20-04 



i 

 i 



Gl &Fo 

 Gl only 



45 



52-42 



16-49 



9-05 

 8-04 



22-04 



3. 

 4 



1 



Gl &Fo 

 Gl only 



40 



40 



42 



53-26 



14-66 



24-04 



1 

 i 



Gl&Fo 

 Gl only 



35 



35 i45'5 



1 



54-09 



12-83 



7-03 



26-05 



1 



4 



Gl &Fo 

 Gl only 



30 



30 

 20 



49 

 56 



21 

 24 



27 



54-93 



10*99 



6-03 



28-05 



1 



Gl&Fo 

 Gl only 



20 



56-59 



7*33 



4 02 



32-06 



1 

 2 



Gl &Fo 

 Gl only 



10 



]0 



63 



58-27 



3-66 



2-01 



36-06 



i ! 



2 



Gl & Fo 

 Gl only 



