32 SIR WILLIAM CROOKES ON SCANDIUM. 



Analysis. 



14-690 grs. left 5 '262 grs. of scandia, = 3'4075 grs. of scandium. 



Theory. Experiment. 



Sc ... 44-100 22-37 23'19 



(CH 3 COO) 2 .. .' 



OH )>153'072 77-63 76'81 



H 2 0. 



197-172 100-00 100-00 



SCANDIUM PROPIONATE, 

 (C s H 5 COO) 2 ScOH. 



Propionic acid readily attacks scandium hydroxide, forming a difficultly soluble 

 white amorphous salt. On evaporating the excess of acid the scandium propioriate is 

 left as a voluminous white powder. 100 parts of cold water dissolve 1"23 parts of 

 scandium propionate, the greater part being precipitated on heating the solution, and 

 re-dissolved on cooling. When boiled in water, the salt floats greasily about the 

 surface. The propionate is easily soluble in alcohol even in the cold, and when the 

 alcoholic solution is allowed to evaporate the propionate is deposited as a mass of 

 minute spherical concretions with no appearance under the microscope of crystalline 

 structure. 



The scandium propionate so obtained has the formula 



(C 2 H 6 COO) 2 ScOH. 



Analysis. 



15-978 grs. on ignition yielded 5'287 grs. of scandia, = 3'424 grs. of scandium. 



Theory. Experiment. 



207-188 100-00 100-00 



