Table 224. 207 



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 (Part unpublished.)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. 



CaSiOg 

 CaSiOa 

 Ca2Si04 



Ca3Si207 . 



CagSiOg . 



CagAlaOe . 

 CasAleOu 

 CaAlaOi . 

 CasAlioOis 

 AlaSiOs . 

 CaA1.2Si208 

 Ca2Al2Si07 

 Ca3Al2Si08 



% CaO AI2O3 SiOj 



48.2 



48.2 



6S- 



65- 



65. 



58.2 



51.8 



51.8 



35- 



35- 



35- 



41.8 



7^.6 — 26.4 



62.2 



47.8 

 35 4 

 24.8 



20.1 

 40.8 

 50.9 



37.8 

 52.2 

 64.6 



75-2 

 62.8 

 36,6 

 37-2 

 30-9 



37-1 

 43-3 

 22.0 

 18.2 



Transformation . 



Melting 



a to )3 and reverse 



Melting 



7 to i3 and reverse 



3 to o and reverse 



Dissociation into Ca2Si04 and 



liquid 



Dissociation into Ca2Si04 and 



CaO 



Dissociation into CaO and liquid 



Melting 



Melting 



Melting 



Melting 



Melting 



Melting 



Dissociation into Ca2Si04+ 



Ca2Al2Si07 and liquid . . 



Temp. 



I 540° -1-2° 

 1200 -j-2 

 2130 -j-IO 



675 ±5 



1420 -J-2 



1475 ±5 



1900 -1-5 

 1535 ±5 

 1455 ±5 

 1600 -I-5 

 1720 --10 

 1816 ^to 

 1550 ±2 



1590 i2 



1335 ±5 



EUTECTICS. 



Crystalline Phases. 



CaSi03,Si02 



Ca.SiOs \ 



3CaO,2Si02 ( 

 Ca,Si04 



CaO. I 



Al2Si06,Si02 

 Al2Si06,Al2O3 



CaAliSiaOs ( 



CaSiOg \ 

 CaAlaSiaOg 



Si02 \ 



CaAlaSiaOa | 



Si02,CaSi03 \ 

 Ca2Al2Si07 



Ca2Si04 j 



AI2O3 ( 



CaAl2Si208 ( 



CaAl2Si208 \ 



Al2Si05,Si02 i 



Ca2Al2Si07 I 



Ca3AlioOi8 j 



Ca2Al2Si07 ( 



CaAl204 i 



Ca2Al2Si07 ] 



CaAl204 \ 



CasAhoOis J 



CaAl2Si208 ( 



Ca2Al2Si07 j 



Ca2Al2Si07 i 



Ca3Si207 > 



CaSiOg ] 



Ca2Al2Si07 ( 



CaSiOg \ 



%CaO AI2O3 SiOj 



37- 

 545 



67.5 



341 

 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 



19-5 

 14.8 



237 

 39-3 

 19.8 

 50.8 

 52-9 

 53-2 

 36.8 

 11.8 

 13.2 



63- 

 45-5 



32-5 



87. 

 36. 



47-3 



70. 



62. 



26.7 



41.4 



70.4 



14.2 

 9-3 

 9-3 



33- 



41. 



41. 1 



Melting 

 Temp. 



436 



45S± 

 o65± 



610 

 810 



299 



359 



165 



545 

 547 

 345 

 552 

 512 



505 

 385 

 310 

 316 



EUTECTICS. 



Crystalline Phases. 



CaAl2Si208 



Ca2Al2Si07 



CaSiOg 



CaAl2Si208 



Ca2Al2Si07 



AI2O3 



Ca2Si04 



CaAl.204 



CasAleOu 



%CaO AI2O3 SiOj 



38. 20. 42. 

 29-2 39- 31-8 

 49-5 43-7 6.8 



Meltinj 

 Temp. 



1265= 



1380 



1335 



QUINTUPLE POINTS, 



Ca2Al2Si07 



Ca3Si07 



Ca2Si04 



Ca2Al2Si07 



Ca2Si04 



CaAl204 



CaAlaSiaOs 



AI2O3 



Al2Si05 



Ca3AlioOi8 



Ca2Al2Si07 



AI2O3 



48.2 II. 9 39.9 



48.3 42. 9.7 

 15.6 36.5 47.9 

 31.2 44.5 24.3 



1335 

 1380 

 1512 

 1475 



QUADRUPLE POINTS. 



3Ca0.2Si02 

 2CaO..Si02 



"il-l 



44-5 



1475 



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

 01 Sc. xxxi, p. 341, igii. 



Smithsonian Tables. 



