38 SIR WILLIAM CEOOKES ON SCANDIUM. 



Theory. Experiment. 



on 



5H S . . . J 



769-424 100-00 lOO'OO 



When the 14-hydrate is heated to 100, nine molecules of water go off, leaving a 



5 -hydrate 



{ C 6 H a (NO a ) 3 } 3 ,ScOH, 5H 2 0. 



Analysis. 



21-657 grs. of the picrate, dried at 100, gave 2'422 grs. of scandia, = 1'569 grs. of 



scandium. 



Theory. Experiment. 



Sc 44-100 7-26 7-24 



OH -I 



2{C 6 H 8 (NO a ) 3 O}. UeS'lSO 92-74 9276 



5H..O . 



607-280 100-00 lOO'OO 



SCANDIUM BENZOATE, 

 (C 6 H 5 COO) 3 Sc. 



Scandium benzoate comes down as a white curdy precipitate on adding a solution 

 of ammonium benzoate to scandium nitrate solution. On boiling the solution the 

 precipitate collects as a crystalline powder. It is slightly soluble in water and 

 alcohol, and easily soluble in dilute mineral acids. 



Analysis. 



12-303 grs. of scandium benzoate left on ignition 2'204 grs. of scandia, = T4272 



grs. of scandium. 



Theory. Experiment. 



( A 



Sc 44-10 10-83 11-60 



On 252-00-j 



H 15 15-12 I 363-12 89-17 88'40 



O 6 96-OOJ 



407-22 100-00 100-00 



