356 P. Eskola — Silicates of Strontium and Barium. 



Table VI. 



Composition wt. per cent 



Oxides Silicates Temper- Time 



CaO. Ba0 2 ature min- Besulting Phases 



CaO BaO Si0 2 Si0 2 Si0 2 °C utes 



Liquidus of a-CaO.Si0 2 

 36.13 17.95 45.92 75 25 1466. 15 Glass 



36.13 



17.95 



45.92 



75 



25 



1457 



15 



Glass and a-CaO.Si0 2 



36.13 



17.95 



45.92 



75 



25 



1441 



15 



Glass and a-CaO.Si0 2 



36.13 



17.95 



45.92 



75 



25 



1344 



15 



a-CaSi0 3 and glass 



28.90 



28.71 



42.38 



60 



40 



1394 



15 



Glass 



28.90 



28.71 



42.38 



60 



40 



1380 



15 



Glass and a-CaO.Si0 2 



24.09 



35.89 



40.02 



50 



50 



1342 



15 



Glass 



24.09 



35.89 



40.02 



50 



50 



1330 



15 



Glass and a-CaO.Si0 2 



24.09 



35.89 



40.02 



50 



50 



1326 



15 



Glass and a-CaO.Si0 2 



24.09 



35.89 



40.02 



50 



50 



1325 



25 



Glass and a-CaO.Si0 2 





Invariant 



point 



a-CaO.SiO.H 



2CaO.Ba0.3Si0 2 -liquid. 



24.09 



35.89 



40.02 



50 



50 



1321 



15 



Glass and a-CaO.Si0 2 



24.09 



35.89 



40.02 



50 



50 



1319 



15 



Glass and 2CaO.Ba0.3Si0 2 



24.09 



35.89 



40.02 



50 



50 



1317 



15 



Glass and 2CaO.Ba0.3Si0 2 



24.09 



35.89 



40.02 



50 



50 



1300 



15 



Glass and 2CaO.Ba0.3Si0 2 



22.88 



37.69 



39.43 



47.5 



52.5 



1323 



15 



Glass 



22.88 



37.69 



39.43 



47.5 



52.5 



1321 



15 



Glass and 2CaO.Ba0.3Si0 2 



22.88 37.69 39.43 47.5 52.5 1314 15 Glass and 2CaO.Ba0.3Si0 2 



Decomposition of 2CaO.Ba0.3Si0 2 



25.13 34.32 40.54 52.18 47.82 1320 30 a -CaO.Si0 2 and glass 



= 2CaO.BaO.3SiO, 



25.13 34.32 40.54 52.18 47.82 1315 20 2CaO.Ba0.3Si0 2 only 



Liquidus of 2CaO.Ba0.3Si0 2 . 



21.68 39.48 38.84 45 55 1321 30 Glass 



21.68 39.48 38.84 45 55 1316 30 Glass and 2CaO.Ba0.3Si0 2 



21.68 39.48 38.84 45 55 1301 30 Glass and 2CaO.Ba0.3Si0 2 



16.99 46.47 36.54 35.26 64.741306 20 Glass 



(BaO.Ca0.2Si0 2 ) 



16.99 46.47 36.54 35.26 64.741300 20 Glass and 2CaO.Ba0.3Si0 2 



16.99 46.47 36.54 35.26 64.74 1294 20 Glass and 2CaO.Ba0.3Si0 2 



16.38 47.37 36.25 34 66 1293 20 Glass and 2CaO.Ba0.3Si0 2 



16.38 47.37 36.25 34 66 1290 20 Glass and 2CaO.Ba0.3Si0 2 



15.66 48.45 35.89 32.5 67.5 1289 15 Glass and 2CaO.Ba0.3Si0 2 



15.42 48.81 35.77 32 68 1290 15 Glass 



15.42 48.81 35.77 32 68 1284 25 Glass and 2CaO.Ba0.3Si0 2 



14.45 50.25 35.30 30 70 1280 20 Glass 



14.45 50.25 35.30 30 70 1276 20 Glass and 2CaO.Ba0.3Si0 2 



14.45 50.25 35.30 30 70 1274 20 Glass and 2CaO.Ba0.3Si0 2 



Eutectic 2CaO.Ba0.3Si0 2 -BaO.SiO a 



16.99 46.47 36.54 35.26 64.74 1273 2CaO.Ba0.3Si0 2 and glass 



16.99 46.47 36.54 35.26 64.74 1271 2CaO.Ba0.3Si0 2 and glass 



16.99 46.47 36.54 35.26 64.74 1265 2CaO.Ba0.3Si0 2 and BaO. 



Si0 2 



