— 964 — 

 Tabella 2 a . 



mol. 0 /o 

 di PbO 



Temperature 

 di cristal izzaz. 

 primaria 



Temperature 

 di cristallizzaz. 

 eutettica 



Durate 

 in secondi 



0.00 



824° 



— 



— 



5.00 



800 



483° 





11.00 



755 



485 



60" 



21.53 



701 



490 



90 



31.57 



632 



492 



13Ó 



42.21 



565 



494 



160 



45.00 



545 



494 



220 



52.34 



? 



494 



250 



56.00 



? 



494 



280 



62.20 



658 



494 



230 



65 00 



588 



493 



210 



72.02 



658 



493 



180 



81.44 



718 



492 



130 



91.35 



797 



490 



80 



95.00 



848 



490 



40 



100.00 



892 







0 10 20 30-^0 50 60 70 60 90100 



PbF, 



mol. °/o PbO 

 Fig. 2. 



PbO 



