TABLE 224. 2.OJ 



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 (Part unpublished.)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 . 

 CaSiO 3 . 

 Ca 2 Si0 4 . 



Ca 3 Si 2 O 7 . 

 Ca 3 SiO 5 . 



Ca 3 Al 2 6 . 

 Ca 5 Al 6 Oi4 

 CaAL0 4 . 



Al 2 Si0 5 . 

 CaAl 2 Si 2 O 8 

 Ca 2 A] 2 SiO7 

 Ca 3 Al 2 SiO 8 



CaO A1 2 O 3 SiO 2 



48.2 

 48.2 



51.8 



51.8 



35- 



35- 



35- 



41.8 



73.6 26.4 



62.2 37-8 

 47-8 52.2 - 

 354 64.6 



2 t 8 Hi 



36.6 



20. i 



40.8 37.2 



5-9 3-9 



37-i 

 43-3 



22.0 

 18.2 



Transformation. 



Melting 



a to ft and reverse 



Melting 



7 to )8 and reverse 



& to a and reverse 



Dissociation into Ca 2 SiO 4 and 



liquid 



Dissociation into Ca 2 SiO 4 and 



CaO 



Dissociation into CaO and liquid 



Melting 



Melting 



Melting 



Melting 



Melting 



Melting 



Dissociation into Ca 2 SiO 4 + 



Ca 2 Al 2 SiO 7 and liquid . . 



Temp. 



I 540 2 

 I2OO -\-2 



2130 -4^10 

 675 5 



I42O -j-2 



1475 5 



1335 5 



EUTECTICS. 



EUTECTICS. 



Crystalline Phases. 



%CaO A1 2 3 Si0 2 



Melting 

 Temp. 



Crystalline Phases. 



%CaO A1 2 O 3 SiO 2 



Meltin 

 Temp. 



CaSiO 3 ,SiO 2 

 Ca,SiO 3 j 



3CaO,2SiO 2 I 

 Ca,SiO 4 j 



CaO. j 



Al 2 Si0 5) SiO 2 

 Al 2 SiO 5 ,Al 2 O 3 

 CaAl 2 Si 2 O 8 1 

 CaSiO 3 ] 



CaAl 2 Si 2 O 8 1 

 Si0 2 j 



CaAl 2 Si 2 O 8 i 

 SiO 2 ,CaSiO 3 \ 

 Ca 2 Al 2 SiO 7 i 

 Ca 2 Si0 4 

 A1 2 3 



CaAl 2 Si 2 O 8 j 

 CaAl 2 Si 2 O 8 I 

 Al 2 Si0 5 ,SiO 2 j 

 Ca 2 Al 2 SiO 7 i 

 Ca 3 AlioOi 8 J 

 CaoAl 2 SiO 7 j 

 CaAl 2 4 

 Ca 2 Al 2 SiO 7 

 CaAl 2 O 4 

 Ca 3 Al 10 18 

 CaAl 2 Si 2 O 8 I 

 Ca 2 Al 2 Si0 7 j 

 Ca 2 Al 2 SiO 7 ; 

 Ca 3 Si 2 7 

 CaSi0 3 

 Ca 2 Al 2 Si0 7 

 CaSi0 3 j 



37- 



54-5 



67.5 - 



- '3- 



64. 



34-i 

 10.5 

 23.2 

 49.6 



!9-3 

 9.8 



35- 

 37-8 



37-5 

 30.2 

 47.2 

 45-7 



18.6 



19-5 

 14.8 



23-7 

 39-3 

 19.8 

 50.8 

 5 2 -9 

 S3- 2 

 36.8 

 1 1.8 

 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 



1436 



2065^ 



1610 

 1810 



1299 



1359 

 1165 



'545 

 1547 

 1345 

 '55 2 

 1512 



1505 

 1385 

 1310 

 1316 



CaAl 2 Si 2 O 8 



Ca 2 Al 2 SiO 7 



CaSiO 3 



CaAl 2 Si 2 O 8 



Ca 2 Al 2 SiO 7 



A1 2 3 



Ca 2 SiO 4 



a 2 SiO 4 ) 



aAl 2 O 4 

 a 5 A! 6 Oi 4 ) 



38. 20. 42. 

 2 9-2 39- 3 1 - 8 

 49-5 43-7 6.8 



1265 



1380 



1335 



QUINTUPLE POINTS. 



Ca 2 Al 2 Si0 7 



Ca 3 Si0 7 



Ca 2 SiO 4 



Ca 2 Al 2 SiO 7 



Ca 2 Si0 4 



CaAl 2 O 4 



CaAl 2 Si 2 O 8 



A1 2 3 



Al 2 SiO 6 



48.2 11.9 39.9 



Ca 2 Al 2 SiO 7 

 A1 2 3 



48.3 42. 



9-7 



15-6 36-5 47-9 



31.2 44.5 24.3 



1335 



1512 



1475 



QUADRUPLE POINTS. 



3CaO.2SiO 2 

 2CaO.Si0 2 



55-5 



44-5 



H75 



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, ign. 



SMITHSONIAN TABLES. 



