Propriedades Minerais - 11º
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Pela definição de Minerais
Não são minerais…Água e líquidos em geral; Gases, Âmbar;
Pérolas; Carvão
Minerais produzidos de forma artificial
São minerais…???
Gelo
Mercúrio, elemento nativo líquido
Petróleo
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Minerais: identificação através de propriedades físicas e químicas
Propriedades Físicas
dos Minerais
Ópticas - cor, brilho, risca ou traço
Mecânicas – Clivagem, Fractura e Dureza
Outras – Densidade – Balança de Jolly
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Minerais: identificação através de propriedades físicas e químicas
Propriedades Químicas dos Minerais
Teste do sabor – Halite, argilas, etc…
Teste do cheiro – argilito, argilas –cheiram a barro quando bafejadas
Teste do ácido – Calcite – faz efervescência (CO2) com ácidos
Composição química dos Minerais –Grupo mais abundante – silicatos (anião SiO4
4- - olivina- Quartzo – Piroxenas
Elementos nativos – Ouro, Prata, Diamante
Sulfuretos ( S 2-) –Pirite
Carbonatos( CO 32-) – calcite
Difracção de Raios X
Pág. 53,54
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Pág. 46,47
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Pág. 47,48
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Pág. 48,49
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Exercícios Pág. 50, 51, 52
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3
2
1
Utilização Prática
ensidadeClivagem/Fractura
Dureza relativa
Traço ou Risca
BrilhoCorMineral
Utilizar livro Pág. 200 – Anexo I –Densidade
Pág. 201, 202,203 - Anexo II – Tabelas de Minerais