Upload
osborne-lester
View
215
Download
1
Embed Size (px)
Citation preview
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
What is a Mineral?What is a Mineral?
Naturally-formed Naturally-formed solidsolid substance substance with a with a crystalcrystal structure structure
Pyromorphite
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
What do all minerals What do all minerals have in common?have in common?
All:All:1.1. Are formed by Are formed by naturalnatural processes. processes.
2.2. Are Are NOTNOT alive and NEVER were alive alive and NEVER were alive
3.3. Have a Have a definitedefinite volume and shape volume and shape
4.4. Are elements or compounds with a Are elements or compounds with a uniqueunique chemical makeupchemical makeup
5.5. Are made up of particles that are arranged Are made up of particles that are arranged in a pattern that is repeated over and over in a pattern that is repeated over and over (called a (called a CRYSTALCRYSTAL))
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Watch “Crystals” by Brainpop…
1.What element are diamonds made from?
2. What do all crystals have in common?
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Groups of MineralsGroups of Minerals
Minerals are grouped by the Minerals are grouped by the elements they are made of.elements they are made of.
Amethyst
Beryl (Emerald)
Calcite
Rubin Pajoohan Fartak International Engineering co. Rubin Pajoohan Fartak International Engineering co. www.irannovation.comwww.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
SilicatesSilicates
Contain Contain oxygenoxygen & & silicasilicaThe most The most abundantabundant group of group of mineralsminerals
Quartz, micaQuartz, mica
MICA Quartz
Rubin Pajoohan Fartak International Rubin Pajoohan Fartak International Engineering co. www.irannovation.comEngineering co. www.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
Non-SilicatesNon-Silicates
Make up only Make up only 5%5% of the of the Earth’s crustEarth’s crustInclude some Include some of the most of the most important important mineralsminerals
iron, copper, iron, copper, gold, silver, gold, silver, diamonds, diamonds, rubiesrubies
Silver
GoldRuby Iron
Copper
Diamond
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
CarbonatesCarbonates Carbon & Carbon & oxygen and oxygen and a positive a positive ion, such as ion, such as calciumcalcium
Calcite Calcite (CaCO(CaCO33))
Calcite with Duftite inclusions
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
OxidesOxides Metallic ion Metallic ion and oxygenand oxygen
Hematite Hematite (Fe(Fe22)O)O33
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
SulfidesSulfides Sulfur and a Sulfur and a metallic ionmetallic ion
Galena (PbS)Galena (PbS)
Rubin Pajoohan Fartak International Rubin Pajoohan Fartak International Engineering co. www.irannovation.comEngineering co. www.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
SulfatesSulfates Metallic ion, Metallic ion, Sulfur & Sulfur & oxygenoxygen
Barite Barite (BaSO(BaSO44))
Barite on Calcite BaSo4 / CaCO3
BariteBaSo4
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Mineral GroupMineral Group CharacteristicsCharacteristics ExamplesExamples
Native Native ElementsElements
Single Single elementselements
Gold (Au), Gold (Au), Diamond (C), Diamond (C), Silver (Ag)Silver (Ag)
Rubin Pajoohan Fartak International Engineering co. Rubin Pajoohan Fartak International Engineering co. www.irannovation.comwww.irannovation.com
How do minerals form?How do minerals form?
1) Cooling of 1) Cooling of magmamagma (hot, (hot, liquid liquid rockrock and minerals inside the earth and minerals inside the earth (from the mantle))(from the mantle)) Fast Cooling = No Crystals (mineraloids)Fast Cooling = No Crystals (mineraloids) Medium Cooling = small crystalsMedium Cooling = small crystals Slow Cooling = large crystalsSlow Cooling = large crystals
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
How do minerals form?How do minerals form?
2) Elements dissolved in 2) Elements dissolved in liquidsliquids (usually water)(usually water)
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
ColorColor Can be Can be misleadingmisleading Can vary with the type of impuritiesCan vary with the type of impurities
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
LusterLuster Surface Surface reflectionreflection metallic = shiny metallic = shiny
like metallike metal non-metallic = non-metallic =
dull, non-shiny dull, non-shiny surfacesurface
Pyrite has a metallic luster
Calcite has a non-metallic lusterRubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
StreakStreak The The colorcolor of the powdered of the powdered
form of the mineralform of the mineral The color of the streak can The color of the streak can
be different than the mineralbe different than the mineral Minerals must be Minerals must be softersofter than than
the streak platethe streak plateRubin Pajoohan Fartak Rubin Pajoohan Fartak
International Engineering co. International Engineering co. www.irannovation.comwww.irannovation.com
Streak…can help identify Streak…can help identify quartzquartz
http://www.childrensmuseum.org/geomysteries/cube/b3.html
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
HardnessHardness How easily a mineral How easily a mineral scratchesscratches
materialsmaterials Mohs Hardness ScaleMohs Hardness Scale
Scale from 1 (Scale from 1 (softestsoftest) to 10 () to 10 (hardesthardest)) Test by seeing if the mineral can scratch Test by seeing if the mineral can scratch
different objects (like human fingernail, different objects (like human fingernail, copper, penny, glass, steel file)copper, penny, glass, steel file)
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Find out more…Find out more…
““Electronic” Hardness TestElectronic” Hardness Test
http://www.childrensmuseum.org/http://www.childrensmuseum.org/geomysteries/cube/b2.html geomysteries/cube/b2.html
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
Cleavage & FractureCleavage & Fracture The way the mineral The way the mineral breaksbreaks CleavageCleavage—minerals break —minerals break
along along smoothsmooth, flat surfaces , flat surfaces and every fragment has the and every fragment has the same general shapesame general shape
FractureFracture—minerals that —minerals that break at break at randomrandom with rough with rough or jagged edgesor jagged edges
Rubin Pajoohan Fartak Rubin Pajoohan Fartak International Engineering co. International Engineering co.
www.irannovation.comwww.irannovation.com
Rubin Pajoohan Fartak International Engineering co. Rubin Pajoohan Fartak International Engineering co. www.irannovation.comwww.irannovation.com
Cleavage or Fracture?Cleavage or Fracture?1.
4.
3.
2.
Rubin Pajoohan Fartak International Engineering co. www.irannovation.comRubin Pajoohan Fartak International Engineering co. www.irannovation.com
Physical Properties of MineralsPhysical Properties of Minerals (can be used to identify the mineral)(can be used to identify the mineral)
Other PropertiesOther Properties Specific gravity (*excellent clue to Specific gravity (*excellent clue to
mineral’s identity)mineral’s identity) Attraction to Attraction to magnetsmagnets Bending of lightBending of light Reaction with hydrochloric acidReaction with hydrochloric acid Smell & tasteSmell & taste
http://www.childrensmuseum.org/geomysteries/cube/b4.html
Rubin Pajoohan Fartak International Rubin Pajoohan Fartak International Engineering co. www.irannovation.comEngineering co. www.irannovation.com
Watch Brainpop—“Mineral Identification”
1. If a mineral can scratch your fingernail, the mineral is _______________ than your fingernail.
2. What is luster?
Rubin Pajoohan Fartak International Rubin Pajoohan Fartak International Engineering co. www.irannovation.comEngineering co. www.irannovation.com