THE DETERMINATION OF REFRACTIVE INDEX 



Table V. 



247 



COMPOUNDS BELONGING TO THE ISOMETRIC SYSTEM WHOSE 



CRYSTALS MAY BE USED FOR THE DETERMINATION 



OF THE REFRACTIVE INDICES OF LIQUIDS. 



Refractive 

 index. 1 



Le 



439 



45° 

 459 

 481 



485 

 490 



494 

 502 



515 



544 

 553 

 559 

 566 



57i 

 640 



645 

 650 



657 

 667 



698 



700 



755 

 78S 



95 + ? 

 071 



Name. 



Sodium alum 



Potassium alum 



Ammonium alum 



Potassium chromium alum 

 Ammonium iron alum. . . . 



Potassium chloride 



Rubidium chloride 



Sodium uranyl acetate. . . 



Sodium chlorate 



Sodium chloride 



Rubidium bromide 



Potassium bromide 



Strontium nitrate 



Barium nitrate 



Ammonium chloride 



Cesium chloride 



Rubidium iodide 



Potassium chlorostannate. 

 Potassium iodide 



Cesium bromide 



Ammonium iodide 



Arsenic trioxide 



Cesium iodide 



Lead nitrate 



Silver chloride 



Formula. 



Na 2 S04-Al 2 (S04)3-2 4 H 2 



K s S04-Al2(S0 4 )j-24H 2 



(NH 4 ) 2 S0 4 -A1 2 (S0 4 )3-24H 2 



K 2 S0 4 -Cr 2 (S0 4 ) 3 -2 4 H 2 



(NHO2 S0 4 -Fe 2 (S0 4 )s- 24 H 2 



KC1 



RbCl 



NaC 2 H 3 2 -U0 2 (C 2 H 3 2 ) 2 



NaC10 3 



NaCl 



RbBr 



KBr 



Sr (N0 3 ) 2 



Ba (NO s ) 2 



NH4CI 



CsCl 



Rbl 



K 2 SnCle 



KI 



_ ^ f n lies between 



CsBr < 



I 1.69 and 1. 71 



NH4I 



Aso0 3 



( Bolland gives 

 I Csl n = 1.95 



Pb (N0 3 \ Groth gives 1.782 



AgCl 



Most of these values for « are taken from Groth's tables, 

 pzig, 1906-10. 



Chemische Krystallographie, 



