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Apresenta

Samuel
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Apresenta

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    3. Quando formado em condies ideais, com a manifestao de seu hbito, pode ser chamado de cristal. Hbito cristalino: a forma geomtrica externa do mineral; Clivagem a quebra sistemtica do mineral em planos paralelos entre s;

    6. 1-Elementos nativos Ocorrem no estado elementar (Prata, ouro, enxofre, cobre,.....) ou como ligas naturais; Metais, semi-metais (As), no-metais (C,S)

    9. 2-Sulfetos combinao de um elemento metlico ou semi-metlico com S Esfarelita (ZnS) Calcopirita (CuFeS2) Galena (PbS) Pirita (FeS2) Molibdenita (MoS2)

    11. 3-xidos e hidrxidos Combinao de oxignio com um ou mais elementos metlicos Cassiterita (SnO2) Espinlio (MgAl2O4) Gibsita Al(OH)3 Hematita (Fe2O3) Magnetita (Fe3O4) Combinao com (OH-) Goethita (FeO(OH)

    15. 4-Halides combinao de ctions de baixa valncia com ons halognicos eletronegativos. Atacamita (Cu2Cl(OH)3) Halita (NaCl) Silvita (KCl) Fluorita (CaF2) Criolita (Na3AlF6)

    18. 5-Carbonatos Combinao de ctions bivalentes com: o complexo aninico (CO3)2- Cerussita (PbCO3) Magnesita (MgCO3) Smithsonita (ZnCO3) Siderita (FeCO3) Calcita (CaCO3) Dolomita (CaMg(CO3)2)

    24. 7-Sulfatos, Cromatos, Molibdatos combinao de ctions bivalentes com os complexos inicos (SO4)2-, CrO4, MoO42-, WO42- Tenardita (Na2SO4) Anidrita (CaSO4) Celestina (SrSO4) Barita (BaSO4) Crocota (PbCrO4) Wulfenita (PbMoO4)

    26. 8-Fosfatos, Arsenatos e Vanadatos combinao de ctions metlicos com os complexos aninicos (PO4)3-, (AsO4)3-, (VO4)3- Monazita ((Ce, La, Nd, Th)PO4) Adamita (Zn2[OH]AsO4) Apatita (Ca5F(PO4)3) Vanadinita (Pb5Cl(VO4)) Vivianita (Fe3PO4.8H2O) Eritrita (Co(AsO4)2.8H2O)

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