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Combined ores

These ores contain metal in combination with oxygen or sulphur or halides. The ores and minerals of various metals are as follows:
Minerals/ores with their chemical formula
1. Iron (VIII, transition metal)
(a) Iron pyrite: FeS2 (as sulphide)
(b) Siderite: FeCO3 (as carbonate)
(c) Red hematite: Fe2O3 (as oxide)
(d) Magnetite: Fe3O4 (as oxide)
(e) Limonite or brown hematite: 2Fe2O3 3H2O (as oxide)
2. Copper (IB, coinage metal)
(a) Cuprite: Cu2O (as oxide)
(b) Copper pyrites: CuFeS2 (as sulphides)
(c) Copper glance: Cu2S (as sulphides)
(d) Malachite: CuCO3 Cu(OH)2
(e) Azurite: 2CuCO3 Cu(OH)2
3. Tin (IVA, amphoteric metal)
(a) Cassiterite or tin stone: SnO2 (as oxide)
(b) Stannite: Cu2S FeS SnS2 (as sulphide)
4. Lead (IVA, amphoteric metal)
(a) Galena: PbS (as sulphide)
(b) Cerussite: PbCO3 (as carbonate)
(c) Anglesite: PbSO4 (as sulphate)
(d) White lead: 2Pb(OH)2 PbCO3 (as carbonate)
5. Magnesium (IIA, bridge metal)
(a) Carnalite: KCl MgCl2 6H2O (as chloride)
(b) Dolomite: MgCO3 CaCO3 (as carbonate)
(c) Magnesite: MgCO3 (as carbonate)
(d) Epsomite: MgSO4 7H2O (as sulphate)
(e) Kieserite: MgSO4 H2O (as sulphate)
(f) Asbestos CaMg(SiO3)4
6. Aluminium (IIIA, amphoteric metal)
(a) Bauxite: Al2O3 2H2O (as oxide)
(b) Corundum: Al2O3 (as oxide)
(c) Feldspar: KAlSi3O6 (as oxide)
(d) Clay silicate; Al2O3 2SiO2 2H2O (as oxide)
(e) Cryolite: 3NaF AlF3(Na3AlF6) (as halide)
(f) Alum: K2SO4 Al2(SO4)3 24H2O (as sulphate)
(g) Diaspora: Al2O3H2O (as oxide)
(h) Mica: K2O 3Al2O3 6SiO2 2H2O (as oxide)
7. Zinc (IIB, amphoteric meal)
(a) Zinc blende: ZnS (as sulphide) or sphalerite.
(b) Zincite: ZnO (as oxide)
(c) Smithsonite: ZnCO3 (as carbonate)
(d) Hemimorphite or calamine: Zn2SiO4 H2O (as silicate)
8. Silver (IB, best reductive metal)
(a) Horn silver chlorapatite: AgCl (as halide)
(b) Lunar caustic: AgNO3 (as nitrate)
(c) Silver glance or argentite: Ag2S (as sulphide)
(d) Ruby silver or pyrogyrite: 3Ag2S Sb2S3

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