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How Minerals Form

How Minerals Form. From magma or lava. Atoms form crystal structures as they cool Crystals from magma deep in the ground tend to be large because of slow cooling Crystals from magma near the surface and lava tend to be small because of quick cooling. Minerals from solution.

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How Minerals Form

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  1. How Minerals Form

  2. From magma or lava • Atoms form crystal structures as they cool • Crystals from magma deep in the ground tend to be large because of slow cooling • Crystals from magma near the surface and lava tend to be small because of quick cooling

  3. Minerals from solution • When the elements and compounds that are dissolved in water leave a solution, crystallization occurs

  4. Minerals from solution • Evaporites – minerals that form when water evaporates and leaves crystals behind

  5. Minerals from hot solution • Veins – narrow channel or slab of mineral that is different than the surrounding rock • Veins are formed from minerals dissolved in very hot water and crystallize in the cracks of rock.

  6. Classifying Minerals

  7. Mineral Groups • Most minerals are made from only 8 elements O Si Al Fe Ca Na K Mg

  8. There are 12 rock forming minerals Feldspar Quartz Calcite

  9. Minerals are classified by their composition Silicates – Si, O (Most common) Carbonates – C with 3 O Sulfates – S with four O

  10. Halides – contains Cl, F, I, Br • Oxides – O with another element • Sulfides – S with another element • Native Elements

  11. Classify each into a mineral group Carbonate Silicate Sulfide Native element Sulfate Silicate Carbonate Halide Siderite (FeCO3) Talc (Mg3Si4O10(OH)2) Cinnabar (HgS) Silver (Ag) Barite (BaSO4) Enstatite (MgSiO3) Malachite (Cu2CO3(OH)2) Sylvite (KCl)

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