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zinc minerals

The principal ore is sphalerite, ZnS ; other important ore minerals are smithsonite, ZnCO3; hemimorphite, Zn4Si2O7(OH)2.H2O ; franklinite, (Zn,Mn,Fe)(Mn,Fe)2O4; willemite, Zn2SiO4; and zincite, ZnO .

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  • ed.young
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