24 P. T. Cleve, 



water, was obtained. The salt pressed between filterpaper lost at 100° 

 4.70 percent (1 mol. H^O = 3.37 percent). 



0.401 gram, dried at 100°, gave by ignition 0.2673 gram Sra^Oa. 



0.2852 gram was mixed with bichromate of potash and heated in 

 a combustion tube. The water was accidentally lost, but the carbonic 

 acid, absorbed by potashley, weighed 0.0738 gram. 



0.3269 gram gave 0.2186 gram Sm^Og. 



In percent: ^, , 



* Cale 



Sm.Os 66.66 — 66.87 348 67.44 



CO', — 25.88 — 132 25.58 



H,Ô — — — 36 — 



516 



Carbonate of samarium and potassium 



SmK2C03+6H,0. 



A solution of the nitrate of samarium gives, on adding bicarbo- 

 nate of potassium, a voluminous, gelatinous precipitate, which in pre- 

 sence of an excess of the bicarbonate is after a time changed into thin, 

 glittering crj^stals. The salt, after pressing between filterpaper, was 

 analysed: 



I. 0.7635 gram lost by 100° 0.1742 gram H^O. The residue was 

 dissolved in hydrochloric acid and precipitated with ammonia. The so- 

 lution of the hydrate, thus thown down, was precipitated with oxalic 

 acid and the oxalate ignited. The filtrate from the hydrate was evapo- 

 rated, the residue carefully ignited and weighed as KCl. 0.3204 gram 

 Sm.^ Os and 0.132 gram KCl were thus obtained. 



II. 0.4701 gram lost at 125" 0.ii46 gram HjO and gave 0.1964 

 gram Snij O3 and 0.0844 gram KCl. 







In percent: n ^ 



'^ I. II. C ale 



Sm^O, 41.96 41.78 348.0 41.72 



K2O 10.92 11.34 94.2 11.29 



CO2 — — 176.0 — 



H2O 22.82 24.38 216.0 25.89 



834.2 



