Difference between revisions of "Brochantite"
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== Description == | == Description == | ||
| − | A vivid green mineral composed of [http://cameo.mfa.org/materials/fullrecord.asp?name=copper | + | A vivid green mineral composed of [http://cameo.mfa.org/materials/fullrecord.asp?name=copper%20sulfate%2C%20tribasic tribasic copper sulfate]. Brochantite was discovered by French grologist, A.J.M Brochant de Villiers. It is a secondary mineral found in oxidized zones of [http://cameo.mfa.org/materials/fullrecord.asp?name=copper copper] deposits in Arizona, Chile, Mexico, and Russia. The mineral also forms as a bright green corrosion product on copper and [http://cameo.mfa.org/materials/fullrecord.asp?name=bronze bronze] artifacts exposed to [http://cameo.mfa.org/materials/fullrecord.asp?name=sulfur sulfur] containing pollution. Brochantite is considered a stable patina, but may indicate pit formation for outdoor leaded bronzes due to the formation of a soluble lead sulfate. |
See also [http://cameo.mfa.org/materials/fullrecord.asp?name=antlerite antlerite]. | See also [http://cameo.mfa.org/materials/fullrecord.asp?name=antlerite antlerite]. | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
tribasic copper sulfate; Brochantit (Deut.); brochantite (Fr., It.); brocantita (Esp.); brochantiet (Ned.); brochantite (Port.) | tribasic copper sulfate; Brochantit (Deut.); brochantite (Fr., It.); brocantita (Esp.); brochantiet (Ned.); brochantite (Port.) | ||
| − | [[[SliderGallery rightalign|Brochantiteitaly1.jpg~Raman|PIG385.jpg~XRD|f385sem.jpg~SEM|f385edsbw.jpg~EDS]]] | + | [[[SliderGallery rightalign|Brochantiteitaly1.jpg~Raman|Brochantite5m.jpg~FTIR|PIG385.jpg~XRD|f385sem.jpg~SEM|f385edsbw.jpg~EDS]]] |
== Other Properties == | == Other Properties == | ||
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* ''Dictionary of Building Preservation'', Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996 | * ''Dictionary of Building Preservation'', Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996 | ||
| − | * | + | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 |
| − | * | + | * Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942 |
| − | * | + | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 |
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Brochantite (Accessed Sept. 2, 2005) | * Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Brochantite (Accessed Sept. 2, 2005) | ||
Revision as of 06:48, 24 July 2013
Description
A vivid green mineral composed of tribasic copper sulfate. Brochantite was discovered by French grologist, A.J.M Brochant de Villiers. It is a secondary mineral found in oxidized zones of copper deposits in Arizona, Chile, Mexico, and Russia. The mineral also forms as a bright green corrosion product on copper and bronze artifacts exposed to sulfur containing pollution. Brochantite is considered a stable patina, but may indicate pit formation for outdoor leaded bronzes due to the formation of a soluble lead sulfate.
See also antlerite.
Synonyms and Related Terms
tribasic copper sulfate; Brochantit (Deut.); brochantite (Fr., It.); brocantita (Esp.); brochantiet (Ned.); brochantite (Port.)
Other Properties
Needle-like prisms in orthorhombic crystalline system.
Streak = pale green. Luster = vitreous. Perfect cleavage in one direction. Fracture = conchoidal
| Composition | Cu4SO4(OH)6 |
|---|---|
| Mohs Hardness | 3.5 - 4.0 |
| Density | 3.9-4.0 |
Additional Information
Mineralogy Database: Brochantite
Authority
- Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Brochantite (Accessed Sept. 2, 2005)