22 . P. T. Cleve, 



Mean of the three determinations: 3.266. 

 Molecular volume: 155.9. 



Spec. Grav. of the anhydrous salt: 



1.0997 gram, t" 14°, sp. Gr. 3.805. 



Molecular volume: 119.3. 



Sulphite of samarium 



Sm.SSOa + SH^O. 



The oxide of samarium dissolves easily in a saturated aqueous 

 solution of sulphurous acid. If the clear solution be heated on a watei'- 

 bath a white amorphous powder is thrown down. For analysis the salt 

 was pressed between filter-paper. 



0.4105 gram lost by 100 — 110° 0.0159 gram HjO and gave 0.4024 

 gram SnijSSOi. 



0.4110 gram lost 0.0142 gram and gave 0.4047 gram Sm,, 3SO4. 



In percent: 



Sm.Og 58.02 58.28 348 58.59 



SO, — — 192 — 



H,Ô 3.87 3.46 54 9.03 



594 



The salt loses at 100° III5O. 



Selenites of samarium. 



1. Basic salt. On adding an excess of neutral selenite of sodium 

 to the sulphate of samarium a voluminous and gelatinous precipitate is 

 thrown down. This precipitate was dried at 100" and analysed. 



0.9005 gr. dissolved in HCl and precipitated with SO2, gave 0.2735 

 gram Se. The Sm^Og obtained from the filtrate by precipitation as 

 oxalate amounted to 0.462 gram. 



In percent: 



S m 0., 51.30 



SeO.3 42.67 



H,0 ■ (6.03) 



100.00 



