SIR WILLIAM CROOKES ON SCANDIUM. 41 



Analysis. 



385-268 100-00 lOO'OO 



SCANDIUM PHENYL-ACETATE, 

 (CJI 5 CH 2 C(X)) a ScOH,:3lI,< ) = C 1(i IT,,( ),Sc,:)IU ). 



Scandium hydroxide is readily attacked l>y aqueous phenvl-acetic acid, with the 

 formation of a white insoluble phenyl-acetate. The salt thus prepared lias, however, 

 a tendency to become more basic, and a better way to prepare it is by double 

 decomposition between ammonium phenyl-acetate and scandium nitrate. When 

 moderately dilute and hot solutions of these salts are mixed and the whole boiled, 

 the phenyl-acetate comes down chiefly on the sides and bottom of the beaker, ;nid 

 adheres to the glass with great pertinacity. It can onlv be removed with difficulty 

 and risk of breakage. The deposit on the glass looks like warty concretions and 

 under a high power appears crystalline. It is almost insoluble in hot or cold water, 

 and is insoluble in alcohol. 



When double decomposition between scandium nitrate and ammonium phenyl- 

 acetate is effected in the cold, the salt comes down as a white curdy precipitate which 

 does not adhere to the glass, and can be washed easily with warm water; boiling 

 water, however, causes it to cohere \\ith contraction. The. dry salt when heated 

 softens and can be pressed into a pasty mass. It does not fuse at a temperature at 

 which decomposition begins. 



Analysis, 



(1) 13"584 grs. of scandium phenyl-acetate precipitated from hot solutions and 



washed with boiling water, filtered and dried at 100 till the weight was 

 constant, yielded on ignition 2'396 grs. of scandia, = T551G grs. of scandium. 



(2) 9'458 grs. of scandium phenyl-acetate precipitated from cold solutions, washed 



and dried at 100 to a constant weight, gave on ignition To 71 grs. of scandia, 

 = 1'0821 grs. of scandiinn. 

 VOL. CCIX. A. G 



