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4.1. What is a mineral?!?!. Objectives for 4.1. Define a mineral Describe how minerals form Classify minerals according to their physical and chemical properties Main idea:

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4 1

4.1

What is a mineral?!?!


Objectives for 4 1
Objectives for 4.1

  • Define a mineral

  • Describe how minerals form

  • Classify minerals according to their physical and chemical properties

    Main idea:

    Minerals are naturally occurring, , inorganic compounds or elements with a definite chemical compostionand ___________________


Little side note on minerals
Little side note on minerals

  • Early humans painted on rock walls made from red & yellow pigments in soils (hematite & ochre)

  • Countries have fought wars and trade companies battled over deposits of table salt (halite)

  • Today, we build our houses out of dry wall (gypsum), cement out of lime (calcite), and extract aluminum from bauxite to make aluminum foil and soda cans

    I FEEL MY IGNORANCE DEPLETING!!


Mineral characteristics
Mineral Characteristics

  • Earth’s crust:


Mineral characteristics1
Mineral Characteristics

  • Naturally occurring:

  • Inorganic:

  • Definite chemical composition: each mineral has unique chemical composition to identify itself

  • Salt or Halite (NaCl)

  • Muscovite (KAl2(AlSi3O10)(OH)2)

  • Graphite ( C )


Mineral characteristics2
Mineral Characteristics

  • Definite crystalline structure:


Rock forming minerals
Rock-Forming Minerals

  • _______ of the 30 most common minerals

  • Primarily composed of the ____ most common elements in the Earth’s crust

  • Oxygen (46.6 %)

  • Silicon (27.7%)

  • Aluminum (8.1 %)

  • Iron (5%)

  • Calcium (3.6 %)

  • Sulfur (2.8%)

  • Potassium (2.6 %)

  • Magnesium (2.1 %)

  • Other (1.5%)


Minerals from magma
Minerals from magma

  • What is magma?

  • Density of magma:

  • What minerals form from magma are based on 2 things:

    Rate at which magma cools is important


Minerals from solutions
Minerals from solutions

  • Saturated solution:

  • Supersaturated solution:


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