1 / 23

Minerals

Minerals. 4 requirements to be considered a mineral:. Naturally Occurring (not manmade). 4 requirements to be considered a mineral:. Inorganic – not from living things Arsenic minerals. 4 requirements to be considered a mineral:. Unique chemical composition (chemical formula)

farrah-sweeney
Télécharger la présentation

Minerals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Minerals

  2. 4 requirements to be considered a mineral: NaturallyOccurring (not manmade)

  3. 4 requirements to be considered a mineral: Inorganic – not from living things Arsenic minerals

  4. 4 requirements to be considered a mineral: Unique chemicalcomposition (chemical formula) Calcite

  5. 4 requirements to be considered a mineral: Definite structuralpattern (crystalline) Quartz

  6. Earth’s Composition • Elements found on Earth: 117 but only 8 are common • Elements found in minerals:about 12

  7. Relationship to Rocks • Are minerals rocks? Yes • Are all rocks minerals? Notalways • Why? Not all rocks fit the criteria of a mineral

  8. Mineral Formation • Precipitation: minerals settle out of solution • Crystallization: structures organization of atoms • Crystal size: depends on amount of time to grow

  9. Physical Properties: • Color – this is the LEAST RELIABLE • One mineral can come in manycolors • Many minerals can be the samecolor Quartz

  10. Physical Properties: • Streak – the color of the mineral in powdered form • May be different than its color • More reliable Pyrite

  11. Physical Properties: • Luster – how it shines or reflects light • Metallic (shiny) vs. nonmetallic (dull, glossy) Metallic Luster Nonmetallic Luster

  12. Physical Properties: • Hardness – resistance to being scratched • Moh’s hardness scale • Ranges from 1 (soft) to 10 (hard)

  13. Hardness Each number is a different mineral Ex: 1= Talc, 10=Diamond, 7= Quartz

  14. Hardness • The hardness of tools used to identify minerals can also be on the scale • Ex: Fingernail = 2.5 Penny = 3.5 Glass = 5.5 Steel nail = 6.5

  15. Physical Properties: • Cleavage – tendency of a mineral to split along planes of weakness • Up to 3 planes

  16. Physical Properties: Fracture – uneven breaks (no cleavage)

  17. Other Possibly Useful Properties: Magnetic

  18. Other Possibly Useful Properties: • Taste (not recommended) • Ex: Halite

  19. Other Possibly Useful Properties: • Acid test – some minerals bubble in hydrochloric acid • Ex: Calcite

  20. Other Possibly Useful Properties: • DoubleRefraction – can see two images through the mineral • Ex: Calcite

  21. Other Possibly Useful Properties: • Fluorescence: glow under UV light

  22. ***IMPORTANT: The physical properties of a mineral are due to the internal arrangement of its atoms!***

  23. http://sciencereviewgames.com/srg/games/gong.php?id=33 https://www.youtube.com/watch?v=cjA2-MrWAVU

More Related