Difference between revisions of "Augite"
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== Description == | == Description == | ||
| − | A shiny, dark-green to black [ | + | A shiny, dark-green to black [[pyroxene|pyroxene]] mineral. Augite is a translucent, silicate mineral containing large amounts of [[magnesium|magnesium]], [[iron|iron]], and [[aluminum|aluminum]]. It occurs throughout the world, often in association with [[basalt|basalt]] or [[gabbro|gabbro]]. In North America, augite is found in Colorado, Oregon, New York, and Ontario. Augite is also found in lunar rocks and meteorites. |
[[File:pa30259augite2.jpg|thumb|Augite]] | [[File:pa30259augite2.jpg|thumb|Augite]] | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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[[[SliderGallery rightalign|augiteitaly1.jpg~Raman]]] | [[[SliderGallery rightalign|augiteitaly1.jpg~Raman]]] | ||
| − | == | + | == Physical and Chemical Properties == |
Monoclinic crystals that are usually short, thick and prismatic. Cleavage is good in two directions (right angles) | Monoclinic crystals that are usually short, thick and prismatic. Cleavage is good in two directions (right angles) | ||
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! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.93-3.49 | + | | 2.93-3.49 g/ml |
|- | |- | ||
! scope="row"| Refractive Index | ! scope="row"| Refractive Index | ||
| 1.671 - 1.761 | | 1.671 - 1.761 | ||
|} | |} | ||
| + | [[File:augitlargekes.jpg|thumb|Augite]] | ||
| − | == | + | == Resources and Citations == |
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| − | + | * Mineralogy Database: [http://www.webmineral.com/data/Augite.shtml Augite] | |
* Sue Fuller, ''Rocks and Minerals'', DK Publishing, Inc., New York City, 1995 | * Sue Fuller, ''Rocks and Minerals'', DK Publishing, Inc., New York City, 1995 | ||
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: augite" | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: augite" [Accessed December 11, 2001 (BW photo)(tech info) |
* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Augite (Accessed Aug 30 2005) |
* ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | * ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | ||
Latest revision as of 14:24, 30 April 2022
Description
A shiny, dark-green to black Pyroxene mineral. Augite is a translucent, silicate mineral containing large amounts of Magnesium, Iron, and Aluminum. It occurs throughout the world, often in association with Basalt or Gabbro. In North America, augite is found in Colorado, Oregon, New York, and Ontario. Augite is also found in lunar rocks and meteorites.
Synonyms and Related Terms
Augit (Deut., Pol.); augiet (Ned.); augita (Esp.); augite (Port.)
Physical and Chemical Properties
Monoclinic crystals that are usually short, thick and prismatic. Cleavage is good in two directions (right angles)
Streak = green. Luster = vitreous to submetallic. Brittle with uneven fracture.
| Composition | (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6 |
|---|---|
| Mohs Hardness | 5.0 - 6.0 |
| Density | 2.93-3.49 g/ml |
| Refractive Index | 1.671 - 1.761 |
Resources and Citations
- Mineralogy Database: Augite
- Sue Fuller, Rocks and Minerals, DK Publishing, Inc., New York City, 1995
- Encyclopedia Britannica, http://www.britannica.com Comment: augite" [Accessed December 11, 2001 (BW photo)(tech info)
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia: http://en.wikipedia.org/wiki/Augite (Accessed Aug 30 2005)
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998