380 SIR WILLIAM CROOKES ON SCANDIUM. 



Analysis of the ^-Hydrate Citrate. 



Theory. Experiment. 



812-5G 100-00 100-00 lOO'OO lOO'OO 



Analysis of the 2-Hydrate Citrate. 



Theory. Experiment. 



(5). (6). 



4Sc 176-40 22-72 22'89l 



> Q "v^O 



3(C 6 H 4 7 ) . 5G4-10 72-641 77-11 J 



2H 2 0. 36-03 4-64 J 4'41 



776-53 100-00 lOO'OO lOO'OO 



The earth resulting from these analyses was dissolved in nitric acid and tested in 

 the spectrograph ; no lines of yttrium or ytterbium could be detected. The mother- 

 liquors were evaporated dry with nitric acid and ignited, and the residual earth tested 

 in the spectrograph ; traces were seen of yttrium and much more of ytterbium. 



SCANDIUM ORTHOCHLOROBENZOATE, 

 C.H.ClCOOScO + (C 6 H 4 CiCOO) 2 Sc(OH). 



Orthochlorobenzoic acid is exactly neutralised with ammonia and heated. To the 

 hot solution scandium nitrate is added until no more precipitate comes down on adding 

 a drop either of the ammonia or of the scandium salt. The whole is boiled and allowed 

 to cool. The scandium orthochlorobenzoate forms a white amorphous precipitate, 

 slightly soluble in hot water. It leaves white scandia on ignition in the air. 



Analysis. 



5-303 gr. of scandium orthochlorobenzoate dried at 105 left on ignition 1'244 gr. 

 of scandia, = 0'8056 gr. of scandium. 



Theory. Experiment. 



587-68 100-00 lOO'OO 



