36 



SIR WILLIAM CROOKES ON SCANDIUM. 



The 5-hydrate of scandium oxalate, dried in a hot-air oven at 100, loses 3 molecules 



of water and becomes a 2-hydrate 



Sc 2 (CA) 3 ,2HA 



Analysis. 



22'445 grs. lost 2-014 grs. of water. 



Theory. Experiment. 



ScA . . 

 3CA . . 



2H,0 



352-200 

 36-032 



388-232 



90-72 



9-28 



100-00 



91-03 



8-97 

 100-00 



The hydrated oxalate, dried in vacua at 100 or in air at 140, loses all but one 

 molecule of water and becomes a mono-hydrate 



Sc 2 (CA) 3 ,HA 



Analysis. 



(1) 32-118 grs. left on ignition 11756 grs. of scandia. 



(2) 15-694 grs. left 5 '8 15 grs. of scandia. 



(3) 8-304 grs. left 3'010 grs. of scandia. 



Theory. Experiment. 



370-216 



100-00 



100-00 



100-00 



100-00 



SCANDIUM SUCCINATE, 

 CH 2 COOSc(OH) 2 



H a O = C 4 H 8 8 Sc 2 ,H 2 0. 



CH 2 COOSc(OH) 2 



This salt comes down as an insoluble white precipitate when dilute solutions of 

 ammonium succinate and scandium nitrate are mixed. It also may be prepared by 

 boiling scandium hydroxide in solution of succinic acid. It is slightly soluble in 

 excess of either reagent, and is insoluble in water or alcohol. When dried in the air 

 it forms a hard porcelain-like mass. 



