CHEMICAL FORMULAS OP MINERALS. 



847 



Psilomelane (259), 



RM!n2+H? 



Wad (260), 



RMn+H? 



Triplite (260), 



(M!n,Fe)4£ 



Copper Nickel (263), 



NiAs 



Chloanthite (263), 



(Ni, Co)As2 



Safflorite (263), 



(Ni, Co, Fe)ArfJ 



Nickel Glance (263), 



Ni(S, As)2 



Capillary Pyrites or Millente 



(264), NiS 



Emerald Nickel (264), 



NiC+2NLH» 



Smaltine (266), 



(Co, Ni)As2 



Erythrine (267), 



Co*Xs+8H 



Blende (269), 



ZnS 



Zincite (270), 



Zn 



Sulphate of Zinc (271), 



2n'S"+7H 



Smithsonite (272), 



2nC 



Calamine (272), 



2n»Si+lifl 



Galena (277), 



PbS 



Minium (280), 



Pb s O* 



Anglesite (281), 



PbS 



Cerusite (281), 



PbC 



Pyromorphite (283), 



Pb*£-HPb01 



Crocoisite (284), 



PbCr 



Cinnabar (287), 



HgS 



Copper Glance (292), 



3uS 



Copper Pyrites (292), 



€uS-r-Fe2S» 



Erubescite (294), 



(Fe, €u)S 



Tetrahedrite (295), 



3uS4-±(Sb, As)»S 8 



Red Copper (296), 



Cu 



Blue Vitriol (297), 



CuS+5H 



Malachite (298), 



(Vc+H 



Azurite (300), 



2Cu(34-Cult 



Chrysocolla (300), 



Cu 3 Si2-}-6H 



Dioptase (301), 



Cu 5 Si2+3H 



Silver Glance (325), 



AgS 



Brittle Silver Ore (326), 



AgS+£Sb 2 S» 



Dark Red Silver Ore (327), 



AgS+iSb2S* 



Light Red Silver Ore (327), 



AgS+iAs2S> 



Horn Silver (827), 



AgCl 



Bromic Silver (327), 



AgBr 



Embolite (827, 



Ag(Cl,Br) 



