38 P. T. Cleve, 



In percent: 



SmgOg 41.39 



K^O 11.47 



C^Os - 



KO 10.89 



Cale 



410.1 



It is to be assumed that a part of the water found consisted of 

 only hygroscopic moisture, so that the amount of water given in the 

 above formula must not by any means be regarded as exact. 



Succinate of samarium 



Sm,3C2H,(C02)2 + 6H20 (at 100« dried SH^O). 



On adding a solution of succinic acid to a solution of the ace- 

 tate of samarium, no precipitate is formed at the ordinary temperature, 

 but, on warming, a copious white microcrystalline powder is thrown down. 

 The succinate is very sparingly soluble in water. It is decomposed on 

 heating and leaves a very voluminous oxide of samarium. The salt lo- 

 ses at 100" 5.87 percent, corresponding to 2 mol. HjO (calc 4.88). 



0.4333 gram salt, dried at 100°, gave on ignition 0.2161 gr. SmaOj. 



In percent: 49.87 SmgOg. Calculated from the formula with 

 SHsO : 49.57. 



Tartrate of samarium 



Sm2 3C2H2(OH2)2 + 6 (dried at 100" 2) H^O. 



A solution of tartaric acid gives with acetate of samarium a white 

 bulky precipitate, which, on warming, changes into a heavy, granula, 

 non crystalline powder. Very little samarium remains in the solu- 

 tion. The tartrate, when recently prepared, is soluble in caustic ammonia, 

 but the solution deposits after some time, or immediately on boiling, a 

 white powder. The salt pressed between filter-paper lost at 100" 8.67 

 percent HgO or 4 mol. (calc 8.45). 



0.4602 gram salt, dried at 100", gave on ignition 0.2067 gr. SmjOg. 



In percent: 44.92 SmzOj, and the formula with 2H2O requires 

 44.61 percent SmgOg. 



