266 



Table 246 



TRANSFORMATION AND MELTING TEMPERATURES OF LIME-ALUMINA- 

 SILICA COMPOUNDS AND EUTECTIC MIXTURES 



The majority of these determinations are by G. A. Rankin. (Part unpublished.) 



Substance. 



CaSi0 3 

 CaSi0 3 

 Ca2Si04 



Ca3Si'207 . 



Ca 3 SiO s . 



Ca 3 Al 2 6 . 

 Ca 5 A] 6 Oi4 

 CaAl 2 4 • 

 Ca 3 AlioOi 8 

 Al,SiO s . 

 CaAl.,Si 2 8 

 Ca 2 Al 2 Si0 7 

 Ca 3 Al 2 Si08 



% CaO A1,0 3 SiOo 



48.S 



48.: 

 65. 

 65- 

 65- 



73-6 



62.2 

 47.8 

 354 

 24.8 



20.1 

 40.8 

 50-9 



37-8 

 52.2 

 64.6 

 75.2 

 62.8 

 36.6 

 37- 2 

 3°-9 



51.8 



51.S 



35- 



35- 



35- 



41.8 



26.4 



37-i 

 43-3 

 22.0 

 18.2 



Transformation. 



Melting 



a to /3 and reverse 



Melting 



7 to /3 and reverse 



£ to a and reverse 



Dissociation into Ca 2 SiC>4 and 



liquid 



Dissociation into Ca 2 SiC>4 and 



CaO 



Dissociation into CaO and liquid 



Melting 



Melting 



Melting 



Melting 



Melting 



Melting 



Dissociation into Ca 2 Si04+ 



Ca 2 Al 2 Si07 and liquid . . 



Temp. 



I 54 0°-j-2 

 I200 -|-2 

 2I3O ^IO 



675 is 



I420 3-2 



H75 ±5 



1900 -t-5 

 J 535 ±5 

 M55 ±5 

 1600 -J- 5 

 1720 -J-io 

 1816 ±10 



1550 ±2 

 I59O -j-2 



!335 ±5 



EUTECTICS. 



Crystalline Phases. 



CaSi0 3 ,Si0 2 



Ca.SiOs 



3CaO,2Si0 2 



Ca 2 Si04 



CaO. 



Al 2 Si0 5 ,Si0 2 



Al 2 Si0 5 ,Al 2 3 



CaAl 2 Si 2 08 



CaSi0 3 



CaAloSi 2 8 



SiO a 



CaAl 2 Si 2 8 



SiOo,CaSi0 3 



Ca 2 Al 2 Si0 7 



Ca 2 Si04 



A1 2 3 



CaAl 2 Si 2 8 



CaAl 2 Si 2 8 



Al 2 Si0 5 ,Si0 2 



Ca 2 Al 2 Si0 7 



Ca 3 Al 10 O 18 



Ca 2 Al 2 Si0 7 



CaAl 2 4 



Ca.,Al 2 Si0 7 



CaAl 2 4 



Ca 3 Al 10 Oi 8 



CaAl 2 Si 2 8 



Ca 2 Al 2 Si0 7 



Ca 2 Al 2 Si0 7 



Ca 3 Si 2 7 



CaSi0 3 



Ca 2 Al 2 Si0 7 



CaSiOs 



%CaO A1,0 3 SiO, 



37- 



54-5 



67-5 



34-1 

 10.5 

 23.2 

 49.6 



19-3 



9.8 



35- 

 37-8 



37-5 

 30.2 

 47.2 

 45-7 



13- 

 64. 



18.6 



•9-5 

 14.8 



23-7 

 39-3 

 19.8 



50.S 

 5^-9 



53- 2 

 36.8 

 11.8 

 13.2 



63- 



45-5 



3 2 -5 



87. 

 36. 



47-3 



70. 



62. 



26.7 



41.4 



70.4 



14.2 

 9-3 

 9-3 



33- 



41. 



41. 1 



Melting 

 Temp. 



43°° 



455± 



o6 5 ± 



610 



810 



299 



359 

 165 



545 

 547 

 345 

 552 

 512 



5°5 

 385 

 310 



3i6 



EUTECTICS. 



Crystalline Phases. 



CaAl 2 Si 2 O g 



Ca 2 Al 2 Si0 7 



Ca 2 Si04 



CaAl 2 Si 2 8 



Ca.,AloSi0 7 



A1 2 3 



Ca 2 Si0 4 



CaAl 2 4 



Ca 5 Al 6 14 



% CaO A1 2 3 SiQ 2 



38. 20. 42. 



29.2 39. 31.8 



49.5 43.7 6.S 



Melting 1 

 Temp 



1265° 

 I3S0 



*335 



QUINTUPLE POINTS. 



Ca 2 Al 2 Si0 7 



Ca 3 Si 2 07 



Ca 2 Si04 



Ca 2 Al 2 Si0 7 



Ca 2 Si04 



CaAl 2 04 



CaAl 2 Si 2 8 



Al 2 O s 



AloSiOg 



Ca 3 AlioOi 8 



CaoAloSi0 7 



A1 2 3 



1 1.9 39.9 



48.3 42. 



9-7 



15.6 36.5 47.9 



31.2 44.5 24.3 



'335 

 1380 

 1512 

 H75 



QUADRUPLE POINTS. 



3Ca0.2Si0 2 

 2CaO.Si0 2 



55-5 



44-5 



1475 



The accuracy of the melting-points is 5 to 10 units. Geophysical Laboratory. See also Day and Sosman, Am. J. 

 of Sc. xxxi, p. 341, IQII. 



Smithsonian Tables. 



