CHEMICAL FORMULAS OF MINERALS. 



84* 



Psilomelane (259), 



RMn2+fl» 



Wad (260), 



RMn+fi? 



Triplite (260), 



(ftn, Fe)*£ 



Copper Nickel (263), 



NiAs 



Chloanthite (263), 



(Ni,Co)A&2 



Safflorite (263), 



(Ni, Co, Fe) A* 



Nickel Glance (263), 



Ni(S, As)2 



Capillary Pyrites or Millente 



(264), NiS 



Emerald Nickel (264), 



NiO+2M» 



Smaltine (266), 



(Co, Ni)As2 



Erythrine (267), 



0osls-|-8fi: 



Blende (269), 



ZnS 



Zincite (270), 



2n 



Sulphate of Zinc (271), 



2nS+7A 



Smithsonite (272), 



2nC 



Calamine (272), 



2n*Si+UB 



Galena (277), 



PbS 



Minium (280), 



Pb s O* 



Anglesite (281), 



£bS 



Cerusite (281), 



f>bC 



Pyromorphite (283), 



fbs^+iPoOl 



Crocoisite (284), 



£b<> 



Cinnabar (287), 



HgS 



Copper Glance (292), 



€uS 



Copper Pyrites (292), 



6uS+Fe2S? 



Erubescite (294), 



(Fe, €u)S 



Tetrahedrite (295), 



€uS+i(Sb, As) ! 



Red Copper (296), 



Cu 



Blue Vitriol (297), 



ou's+sfl: 



Malachite (298), 



Cu2<3+fi 



Azurite (300), 



2CuO+Cufi: 



Chrysocolla (300), 



Cu 3 Si2-L.6fi: 



Dioptase (301), 



Cu s S"i2-f3fl 



Silver Glance (325), 



AgS 



Brittle Silver Ore (326), 



AgS+£Sb 2 S« 



Dark Red Silver Ore (827), 



AgS-HSb2S» 



Light Red Silver Ore (827), 



AgS+£As«S» 



Horn Silver (327), 



AgCl 



Bromic Silver (327), 



AgBr 



Embolite (327, 



Ag(Cl,Br) 



