160 Table 244 



MELTING POINT OF SOME REFRACTORY SUBSTANCES 



(Compiled by F. C. Kracek, Geophysical Laboratory, Carnegie Institution, 1930.) 



Symbols: m, melting point; r, reaction temperature, resulting in the break up of a compound into another and liquid; 

 d, compound decomposes before melting with evolution of gas; vac, melting in vacuo. 



Compound 



AI2O3 



BN 



BaO 



BeO 



CaO 



Ce 2 3 



FeO? 



Fe 2 3 



Fe 3 4 



La 2 3 



Li 2 



MgO 



MnO 



PbO 



Si0 2 



SrO 



Th0 2 



Ti0 2 



Yt 2 3 



ZnO 



Zr0 2 



BINARY 

 SILICATES 



2BaO.Si0 2 



BaO.Si0 2 



2Ba0.3Si0 2 .... 



Ba0. 2 Si0 2 



BeO.Si0 2 



3CaO.Si0 2 



2CaO.Si0 2 



3Ca0.2Si0 2 



CaO.Si0 2 



2CdO.Si0 2 



CdO.Si0 2 



K 2 O.Si0 2 



K 2 0.2Si0 2 



K 2 0.4Si0 2 



2Li 2 O.Si0 2 



Li 2 O.Si0 2 



Li 2 0.2Si0 2 



2MnO.Si0 2 . . . . 



MnO.Si0 2 



2MgO.Si0 2 .... 



MgO.Si0 2 



2Na 2 O.Si0 2 ... . 



Na 2 O.Si0 2 



Na 2 0.2Si0 2 ... . 



2PbO.Si0 2 



PbO.SiO, 



2SrO.Si0 2 



SrO.Si0 2 



2ZnO.Si0 2 



ZnO.Si0 2 ? 



Zr0 2 .Si0 2 



t°c 



2050 ± 

 1240 



1923 ± 

 2400 ± 



2572 ± 

 1692 



1419 



1560 



1540 



2000 



1650 

 2800 ± 

 1650 



888 ± 



I7i3± 

 2430 ± 

 3050 ± 

 1640 

 2410 



1975 ± 

 2690 



25 



>i755 

 1604 



1450 

 1420 



>i755 

 1900 

 2130 

 1475 

 1540 

 1242 

 1242 

 976 

 1036 



765 

 1256 

 1201 

 1032 



1323 

 1273 

 1890 



1557 

 1 120 

 1088 



875 

 746 

 766 



>i755 

 1580 

 1512 

 1437 

 2550 



±5 

 ± 2 



±4 



± 20 

 ± 20 



±5 

 ± 2 

 ± 2 

 ± 2 



± 1 

 ±0.5 



±5 

 ± 2 



±5 



20 



±5 



± 

 ± 



± 

 ± 

 ± 

 ± 



±50 



Compound 



BINARY 

 ALUMINATES 



3CaO.Al 2 3 



5 Ca0. 3 AI 2 3 



CaO.Al 2 3 



3 Ca0. 5 Al 2 3 



Li 2 O.Al 2 3 



MgO.Al 2 3 



Na 2 O.Al 2 3 



ALUM I NO- 

 SILICATES 



BaO.Al 2 3 .2Si0 2 .. 

 2CaO.Al 2 3 .Si0 2 .. 

 CaO.Al 2 3 .2Si0 2 .. 

 K 2 O.Al 2 3 . 2 Si0 2 . . 

 K 2 O.Al 2 3 .4Si0 2 . . 

 K 2 O.Al 2 3 .6Si0 2 . . 

 Li 2 O.Al 2 3 .2Si0 2 . . 

 Li 2 O.Al 2 3 .4SiOo.. 

 Na 2 O.AI 2 3 .2Si0 2 . 

 Na 2 O.Al 2 3 .6Si0 2 . 

 SrO.AI 2 3 . 2 Si0 2 .. 

 2Si0 2 .3Al 2 3 



TERNARY 

 CALCIUM 

 SILICATES 



Ba0.2Ca0.3Si0 2 . 



K 2 O.CaO.Si0 2 . . . 



2K 2 O.Ca0. 3 Si0 2 .. 



K 2 0.3Ca0.6Si0 2 .. 



4K 2 O.Ca0.ioSi0 2 . 



2 K 2 O.Ca0.6Si0 2 .. 



K 2 0. 2 Ca0.6Si0 2 .. 



K 2 0.2Ca0. 9 Si0 2 .. 



MgO.CaO.Si0 2 ... 



MgO.2CaO.2SiO.>. 



2Mg0.5CaO,6Si0 2 



MgO.Ca0.2Si0 2 . . 



2Na 2 O.CaO.^Si0 2 . 



Na 2 0.2Ca0.3Si0 2 . 



Na 2 0.3Ca0.6Si0 2 . 



MISCEL- 

 LANEOUS 

 COMPOUNDS 



2CaO.Fe 2 3 



CaO.Fe 2 3 



2CaO.B 2 3 



CaO.Zr0 2 



K 2 0.2Ti0 2 



Na 2 O.Fe 2 3 .4Si0 2 . 



t°c 



1535 ±5 

 1455 ±5 

 i6qo ± 5 

 1720 ± 10 

 >i625 



2135 =b 20 

 1650 



>i7oo 



I590 ±2 

 1550 ±2 



>i755 

 1686 ± 5 

 1 1 70 



1388 ±5 

 1400 ± 3 

 1526 ± 2 

 1100 ± 10 



>I700 

 1810 ± 10 



1320 ±4 



1010 ± 5 



ioi5±5 

 946 ± 1 



959 ± 1 

 ni5±5 

 1025 ± 5 

 1498 ±5 

 1458 ± 2 

 1365 ±5 

 1391 ±2 

 1141 ±5 

 1284 ± 5 

 1047 



1436 ± 5 

 1216 ± 5 



1304 ± 5 

 2350 ± 25 



980 



990 ± 10 



Type 



Author List (References may be located in Abstract Journals): (1), Bowen, 1913- (2) Bowen, 1914- (3) Bowen, 

 Andersen, 1914. (4) Bowen, 1917- (S) Bowen, Greig, 1924. (6) Bowen, Schairer, 1929. (7) Bunting, 1926. 

 (8) Cooper et al, 1909. (9) Day, Shepherd, Rankin, Wright, 1909-15. (10) Day, Sosman, Allen, 1911. (11) 

 Eskola, 1922. (12) Ferguson, Merwin, 1919. (13) Ferguson, Buddington, 1920. (14) Friedrich, Sitting, 1925. 

 (15) Goeke, 191 1. (16) Greig, 1927. (17) Jaeger, 191 1. (18) Jaeger, Simek, 1914. (19) Jaeger, van Klooster, 1914. 

 (20) Jaeger, van Klooster, 1916. (21) Jaeger, van Klooster, 1919. (22) Kanolt, 1914. (23) Kracek, 1930. (24) 

 Kracek, Bowen, Morey. 1929. (2s) Matignon, 1925. (26) Morey, 1917. (27) Morey, Bowen, 1922. (28) Morey, 

 Bowen, 1924. (29) Morey, Bowen, 1925. (30) Morey, Kracek, Bowen, 1930. (31) Niggli, 1916. (32) Rankin, 

 Merwin, 1916. (33) Roberts, 1924. (34) Ruff et a!, 1916. (35) Ruff et al, 1929. (36) Schumacher, 1926. (37) 

 Slade, Higson, 1919. (38) Sosman, Merwin, 1916. (39) Tiede, Birnbrauer, 1914. (40) Washburn, Libman, 1920. 



Smithsonian Tables 



