102 



L. F. Nilson. 



Analyses: 



1) 0.6735 gr. salt gave 0.2615 gr. selenium or 0.3674 gr. selenious acid 

 and 0.2035 gr. oxide of indium. 



2) 0.579 gr. salt gave 0.224 gr. selenium or 0.3147 gr. selenious acid 

 and 0.176 gr. oxide of indium. 



3) 0.4505 gr. salt lost 0.054 gr. of its weight at 100°. 



Represented in 100 parts: 



experiment theory 



1. 2. 3. 



Oxide of indium . 30.21 30.39 — 2In 2 3 549.6 30.22 



Selenious acid . . 54.55 54.36 — 9Se0 2 999.0 54.93 



Water (loss) .. . 15.24 15.25 11.99 15H 2 Q 270. Q 14.85 



100.00 100.00 1818.6 100.00 



Through this salt, which at 100 loses 12 mol. water (calc. 11.88 

 pr. ct.), so that a waterfree sesquiselenite appears to be formed, indium, as 

 regards its relation to selenious acid, places itself by the side of alumi- 

 nium and didymium, which also have given salts of an analagous composi- 

 tion; yet it is to be observed the didymium-salt was obtained, when a te- 

 raselenite was to be expected. 



4. Diseleilite: In 2 .0 ,i .3SeO + 3H 2 .0 2 .SeO + 4H 2 0. 



Was formed, when the basic salt was digested with 39 mol. or 

 169.91 pr. ct. selenious anhydride, and the mixture was dried at about 60°; 

 after treatment with water, there remained a salt, insoluble therein, which 

 examined with the microscope proved to be distinctly crystalline. 



Analyses: 



1) 0.5825 gr. salt gave 0.262 gr.- selenium or 0.3681 gr. selenious acid and 

 0.1485 gr. oxide of indium. 



2) 0.609 gr. salt gave 0.2715 gr. selenium or 0.3815 gr. selenious acid and 

 0.157 gr. oxide of indium. 



3) 0.615 gr. salt at 100°, lost 0.0635 gr. or 6 mol. water. 



Represented in 100 parts: 



found calculated 



1. 2. 3. 



Oxide of indium. . . 25.49 25.78 — ln 2 3 274.8 25.76 



Selenious acid. . . . 63.19 62.64 — 6Se0 2 666.0 62.43 



Water (loss) 11.32 11^58 10.32 7H 2 _1 26.0 _1 1.81 



100.00 100.00 1066.8 100.00 



