Researches on the Salts of Selenious Acid. 



17 



Calculated on 100 parts: 



theory 



Eubidia — 26.68 



Selenious acid . . 64.55 64.58 

 Water (loss) ... — 8.74 



V 2 Rb 2 0. 93.4 27.28 

 2Se0 2 222.0 64.83 

 iy 2 H s O 27.0 7.89 



100.00 



342.4 100.00 



SELENITES OF (LESIUM 



have also hitherto not been investigated; they show a complete analogy to 

 the selenites already treated of, except in the proportion of water contained 

 in the neutral salt. 



The salt, prepared from carbonate of caesium with a necessary quantity 

 of selenious acid, crystallized from a very concentrated solution and formed 

 a radiate mass of which the individual crystals seemed to be long, oblique, 

 four-sided prisms, with obliquely truncated ends. It is so deliquescent that 

 the crystals, within a few moments, liquefy in air. After desiccating between 

 bibulous paper, it was consequently, for the following analyses, dried over 

 sulphuric acid under the receiver of the air-pump. 



1) l.n gr. salt gave 0.194 gr. selenium or 0.2726 gr. selenious acid and 

 0.903 gr. sulphate of caesium or 0,7034 gr. oxide of caesium. 



2) 0.9175 gr. salt gave 0.1595 gr. selenium or 0.2241 gr. selenious acid 

 and 0.749 gr. sulphate of caesium or 0.5835 gr. oxide of caesium. 



l. Neutral: Cs 2 .0 2 .SeO + 3H 2 0. 



Analyses: 



Calculated on 100 parts: 



theory 



Oxide of caesium ... 63.37 63.60 



Selenious acid 24.56 24.42 



Water (loss) 12.07 11.98 



CVO 282 63.09 

 SeO 2 111 24.83 

 3H 2 54 12.08 



100.00 100.00 



447 100.00 



Nova Acta Keg. Soc. Sc. Dps. Ser. III. 



3 



