TABLE 483.— CURIE CONSTANT AND TEMPERATURE FOR 461 



PARAMAGNETIC SUBSTANCES 



The relation deduced by Curie that x = C/T, where C is a constant and T the absolute 

 temperature, holds for some paramagnetic substances over the ranges given in the follow- 

 ing table. Many paramagnetic substances do not obey the law. See the following table. 



Substance C X 10° Range °C 



Oxygen 33,700 20° to 450° C 



Air 7,830 — — — 



Palladium 1,520 20 to 1370 



Magnetite 28,000 850 " 1360 



Cast iron 38,500 850 " 1267 



Substance C X 10 a Range °C 



Gadolinium sulfate.. 21,000 —259° to 17 



Ferrous sulfate .... 11,000 —259 " 17 



Ferric sulfate 17,000 —208 " 17 



Manganese chloride. 30,000 —258 " 17 



TABLE 484.— TEMPERATURE EFFECT (°C) ON SUSCEPTIBILITY OF 

 DIAMAGNETIC ELEMENTS* 



Tables 484 and 485 are from Honda and Owen. 



TABLE 485.— TEMPERATURE EFFECT (°C) ON SUSCEPTIBILITY OF 

 PARAMAGNETIC ELEMENTS 



SMITHSONIAN PHYSICAL TABLES 



