346 



CHEMICAL COMPOSITION OP MINERALS. 



Euclase (199), 



(iBe-H3tl)Si*=5eSif+ 



ass? 



Chrysoberyl (199), 



Be+3tl3 





Zircon (200), 



2rSi 





Yttrocerite (206), 



(Ca, Ce, Y)F 





Monazite (206), 



(Ce,La,Th)^ 





Allaioite (see above). 







Rutile (210), 



Ti 





Sphene(211), 



(Ca+Ti)§i^=r(fi)Si* 





Tin Pyrites (213), 



<3uS(Sn*S s ,Fe*S») 





Tin Ore (214), 



Sn 





Molybdenite (217), 



MoS* 





Molybdic ocher (218), 



So 





Tungstic ocher (218), 



w 





Scheelite (Tungstate of lime, ' 



219), Caw 





Gray Antimony (222), 



Sb*S» 





White Antimony (224), 



Sb 2 O s 





White Arsenic (226), 



As 2 3 





Omiment (226), 



As 2 S» 





Realgar (226), 



AsS 





Uranite (228), 



6a«J?+«4P+16fl 





Chalcolite (229), 



0u»P+©*f+16fi 





Pyrites (231), 



FeS* 





Pyrrhotine (233), 



Fe'Ss ; FeS. 





Mispickel (234), 



Fe(As, S) a 





Magnetite (235), 



FePe 





Specular Iron (237), 



£e 





Limonite (239), 



Pe 2 £' 





Gothite (240), 



£e3 





Franklinite (240), 



2n(3Pe.Mn) 





Ilmeuite (241), 



(SeJPi) 





Chromic Iron (241), 



Fe(gr) 





Columbite (243), 



Fe 3 Cb a 





Tantalite (ferrotant»lite, 244), 



FeTa 





Wolfram (244), 



(Fe, Mn)w 





Copperas (246), 



F*S+7& 





Spathic Iron (247). 



FeC 





Vivianite (248), 



£e»P+8a 





Ehodonite (258), 



Mn*S> 





Pyrolusite (259) 



Mo 





