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Unit 5:. Minerals are: Solid Formed in nature Inorganic Of a definite composition Composed of a particular crystal structure.

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Presentation on theme: "Unit 5:. Minerals are: Solid Formed in nature Inorganic Of a definite composition Composed of a particular crystal structure."— Presentation transcript:

1 Unit 5:

2 Minerals are: Solid Formed in nature Inorganic Of a definite composition Composed of a particular crystal structure

3 Minerals are formed by natural processes Minerals are Inorganic Inorganic – not formed from living matter Minerals are not living and never were living Salt is a mineral, coal and sugar are not

4 All minerals are solid – definite shape, definite volume Most are compounds, some are elements Contain same elements in same ratio Ex: SiO 2

5 Crystals are solids with repeating patterns More space = better crystal formation

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7 Minerals can form from Magma Magma – molten material found beneath Earths surface If magma cools slowly in Earths heated interior, large crystals can form If magma cools at Earths surface, or comes into contact with air or water, smaller crystals form

8 Minerals can also form from a solution Supersaturated solutions will cause crystals to precipitate If the liquid of a solution evaporates, the remaining elements form crystals

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10 Silicates – Silicon + Oxygen + Metal(s) Ex: Olivine - Mg 2 SiO 4

11 Carbonates – CO 3 and Metal(s) Ex: Calcite - CaCO 3

12 Oxides – Oxygen and Metal(s) Ex: Hematite– Fe2O3 Sulfates – SO4 and Metal(s) Anhydrite CaSO4 Sulfides – Sulfur and Metal(s) Pyrite – FeS2 Halides – Halogen (Cl or F) and Metal(s) Halite - NaCl

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