426 TABLE 440.— DIELECTRIC CONSTANT OF LIQUIDS 



Temperature coefficients of the formula : K 9 = Kitl — a(t — 9) + /3(< — 0) 2 ] 



Substance 



P 



Temp, 

 range, °C 



Amyl acetate 0024 



Aniline 00351 



Benzene 00106 



Carbon bisulfide 000966 



000922 



Chloroform 00410 



Ethyl ether 00459 



Methyl alcohol 0057 



Oils: Almond 00163 



Castor 01067 



Olive 00364 



Paraffin 000738 



Toluene 000921 



000977 



Water 004474 



" 004583 



" .: 00436 



Meta-xylene 000817 



.0000087 



.00000060 

 .000015 



.000026 



.0000072 



.00000046 



.0000117 



10-40 



20-181 

 22-181 



0-13 

 20-181 

 5-20 

 0-76 

 4-25 

 20-181 



TABLE 441.— DIELECTRIC CONSTANT OF LIQUEFIED GASES 



A wavelength greater than 10000 cm is designated by °°. 



E E 



Temp. 



Substance °C 



Air —191 



Ammonia — 34 



" 14 



Carbon dioxide . . . — 5 



"... 



" ... +10 



" ... +15 



Chlorine — 60 



-20 







+10 







+14 



Cyanogen 23 



Hydrocyanic acid . 21 



Hydrogen sulfide . 10 



" . 50 



" . 90 



75 



75 



130 



100 

 84 



Dielectric 

 constant 



1.43, 



1.47-1.50 



21-23 

 16.2 



1.60 8 



1.58, 



1.54. 



1.52, 



2.15o 



2.03» 



1.97 



1.94, 



2.08 



1.88 



2.52 

 about 95 



5.93 



4.92 



3.76 



Substance 



Nitrous oxide 



Temp. 

 °C 



£~ 



Oxygen 



Sulfur dioxide 



N 2 —88 

 -5 

 +5 

 +15 

 -182 



Critical 



14.5 



20 



40 



60 



80 

 100 

 120 

 140 

 154.2 



120 



Dielectric 

 constant 



1.93 3 

 1.63o 

 1.57, 

 1.52o 

 1.49, 

 1.46. 



13.75 



14.0 



12.5 



10.8 

 9.2 

 7.8 

 6.4 

 4.8 

 2.1 



TABLE 442.— DIELECTRIC CONSTANT OF ROCKS* 



Material 



Chalk, 



middle Devonian 

 Coral dolomite 

 Granite 



Wave- 

 length, 

 cm 



Dielectric 



constant, 



range 



8.0-9.0 

 8.0-9.0 

 7.0-9.0 



* For reference, see footnote 45, p. 136. 



Material 



Limestone 



Marmorized limestone 3X10 



Mica schist 



Sandstone, variegated 



SMITHSONIAN PHYSICAL TABLES 



