50 



L. F. Nilson, 



In 100 parts: 



found 



calculated 



Glucina 8.30 



Selenious acid ... 82.15 

 Water (loss) .... 9.55 



3BeO 75.6 8.02 

 7Se0 2 777.0 82.43 

 5H 2 90.0 9.55 



100.00 



942.6 100.00 



As a solution, containing diselenite of glucinum, at a somewhat higher 

 temperature, was decomposed in such a manner, that it first deposited 8 / 5 - 

 and then V3 -selenite, there probably remaining a small quantity of free 

 selenious acid, according to the formula of reaction: 



8(Be.0 2 .SeO + H 2 .0 2 .SeO) = (5Be.0 2 .SeO + 3H 2 .0 2 SeO) + (3Be.0 2 .SeO + 4H 2 .0 2 .SeO) 



I tried, how such a solution would behave, if allowed to crystallize by 

 means of spontaneous evaporation at the ordinary temperature. Then was 



afforded from the syrupy solution in a completely homogeneous crystal- 

 lization of oblique, four-sided lamels, showing the same comportment to 

 water and hydrochloric acid, as the preceding acid salts. 



An aly ses: 



1) 0.5292 gr. salt gave O.3133 gr. selenium or 0.4402 gr. selenious acid 

 and 0.0465 gr. glucina. 



2) 0.519 gr. salt gave 0.308 gr. selenium or 0.4328 gr. selenious acid and 

 0.0455 gr. glucina. 



3) 0.3688 gr. salt, after heating to 100°, showed no loss of weight. 



+ H 2 .0 2 .SeO 



5. Diselenite: Be.0 2 .Se0 2 + H 2 .0 2 .SeO 



Centesimally represented : 



found 



calculated 



1. 2. 



Glucina 8 . 78 8 . 76 



Selenious acid .... 83.18 83.39 

 Water (loss) 8.04 7 . 85 



BeO 25.2 9.50 

 2Se0 2 222.0 83.71 

 H 2 18.0 6.79 



100.00 100.00 



265.2 100.00 



