Difference between revisions of "Brochantite"
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== Description == | == Description == | ||
| − | A vivid green mineral composed of [[copper sulfate, tribasic|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. | + | A vivid green mineral composed of [[copper sulfate, tribasic|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]]. | See also [[antlerite]]. | ||
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[[[SliderGallery rightalign|Brochantite.TIF~FTIR (MFA)|Brochantite Raman MFA 385.TIF~Raman (MFA)|PIG385.jpg~XRD|f385sem.jpg~SEM|f385edsbw.jpg~EDS]]] | [[[SliderGallery rightalign|Brochantite.TIF~FTIR (MFA)|Brochantite Raman MFA 385.TIF~Raman (MFA)|PIG385.jpg~XRD|f385sem.jpg~SEM|f385edsbw.jpg~EDS]]] | ||
| − | == | + | == Physical and Chemical Properties == |
Needle-like prisms in orthorhombic crystalline system. | Needle-like prisms in orthorhombic crystalline system. | ||
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| − | == | + | == Resources and Citations == |
| − | Mineralogy Database: [http://www.webmineral.com/data/Brochantite.shtml Brochantite] | + | * Mineralogy Database: [http://www.webmineral.com/data/Brochantite.shtml Brochantite] |
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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 | ||
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* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Brochantite (Accessed Sept. 2, 2005) |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 11:05, 27 October 2020
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.)
Physical and Chemical 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 |
Resources and Citations
- Mineralogy Database: Brochantite
- 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: http://en.wikipedia.org/wiki/Brochantite (Accessed Sept. 2, 2005)