1826.] affecting Chemico-Mineralogical Systems. 429 



Silicco.titanates. „ „ , ^ „^ 



Sphene C ri« + C S' 



Tantalic acid " 



Tantalutes. 

 Yttrotantalite. 



black 



b. . brown. 



c. yellow 



Tantalite. 



a. froniKimito Mn Ta'^ + Fe Ta'' 



Mnf Ta» 



b. from Finbo. 



from Brodbo 



a, fromBayern M^ Ta* + 4 Fe3 Ta< 



e. from Kimito, but giving a cinna- Fe f ... 



mon-coloured powder C Ta' 



Mn) 



Oxide of antimony Sb 



Oxide of antimony with sulphuret of anti- ... 



mony (oxi-sulphurette d'antimony) Sb + 3 Sb S3 



Antimonious acid Sb 



Tungstic acid W 



2'ungsiates. 



. . • • • 

 Scheelin Ca W 



Wolfram Mn W^ + 3 Fe W^ 



TungsUte of lead Pb W 



Molybdicacid Mo 



Molybdate of lead Fb Mo' 



Oxide of chrome Chr 



Chromatcd iron. 



