Difference between revisions of "Aurichalcite"
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[[File:Aurichalciteemr1.jpg|thumb|Aurichalcite]] | [[File:Aurichalciteemr1.jpg|thumb|Aurichalcite]] | ||
== Description == | == Description == | ||
| − | + | [[File:aurichalciteweb.jpg|thumb|Aurichalcite acicular crystals]] | |
A pale green to blue mineral that is sometimes found as a encrustations on bronzes. Aurichalcite is composed of copper zinc carbonate hydroxide. As a mineral, it forms in the oxidation zones of zinc-copper deposits. Sources of the mineral are found in Greece (Laurium), Namibia (Tsumeb, Marpimi), Mexico (Durango), and the U.S. (Bisbee Arizona, Colorado, Utah. The transparent to translucent needle-like crystals grow as aggregates. | A pale green to blue mineral that is sometimes found as a encrustations on bronzes. Aurichalcite is composed of copper zinc carbonate hydroxide. As a mineral, it forms in the oxidation zones of zinc-copper deposits. Sources of the mineral are found in Greece (Laurium), Namibia (Tsumeb, Marpimi), Mexico (Durango), and the U.S. (Bisbee Arizona, Colorado, Utah. The transparent to translucent needle-like crystals grow as aggregates. | ||
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[[[SliderGallery rightalign|Aurichalciteitaly1.jpg~Raman]]] | [[[SliderGallery rightalign|Aurichalciteitaly1.jpg~Raman]]] | ||
| − | == | + | ==Physical and Chemical Properties== |
| − | Transparent acicular, orthorhombic crystals with silky to pearly in luster; Streak = white; Fracture = uneven; Cleavage is perfect in one direction; | + | * Transparent acicular, orthorhombic crystals with silky to pearly in luster; |
| − | + | * Streak = white; | |
| − | Reacts with acids to release carbon dioxide bubbles. | + | * Fracture = uneven; |
| + | * Cleavage is perfect in one direction; | ||
| + | * Reacts with acids to release carbon dioxide bubbles. | ||
{| class="wikitable" | {| class="wikitable" | ||
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! scope="row"| Density | ! scope="row"| Density | ||
| − | | 3.6 - 4.0 | + | | 3.6 - 4.0 g/ml |
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! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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| − | == | + | ==Resources and Citations== |
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| − | * | + | * Minerals: mineral.galleries.com/minerals/carbonate/aurichal/aurichal.htm (density 3.6-4.0, hardness 1-2) |
| − | * Website | + | * Website: www.azminerals.com/AS%20Minerals/Aurichalcite.htm (hardness 1.5, density 3.93) |
| − | * Website | + | * Website: webmineral.com/data/aurichalcite.shtml (density 3.64-3.9, hardness 2) |
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Aurichalcite (Accessed Sept 2, 2005; density = 3.96, hardness = 1-2) |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 14:33, 30 April 2022
Description
A pale green to blue mineral that is sometimes found as a encrustations on bronzes. Aurichalcite is composed of copper zinc carbonate hydroxide. As a mineral, it forms in the oxidation zones of zinc-copper deposits. Sources of the mineral are found in Greece (Laurium), Namibia (Tsumeb, Marpimi), Mexico (Durango), and the U.S. (Bisbee Arizona, Colorado, Utah. The transparent to translucent needle-like crystals grow as aggregates.
Synonyms and Related Terms
mountain copper; oreichalkos (Gr.)
Physical and Chemical Properties
- Transparent acicular, orthorhombic crystals with silky to pearly in luster;
- Streak = white;
- Fracture = uneven;
- Cleavage is perfect in one direction;
- Reacts with acids to release carbon dioxide bubbles.
| Composition | (Zn,Cu)5(CO3)2(OH)6 |
|---|---|
| Mohs Hardness | 1 - 2 |
| Density | 3.6 - 4.0 g/ml |
| Molecular Weight | mol. wt. = 546.71 |
Resources and Citations
- Minerals: mineral.galleries.com/minerals/carbonate/aurichal/aurichal.htm (density 3.6-4.0, hardness 1-2)
- Website: www.azminerals.com/AS%20Minerals/Aurichalcite.htm (hardness 1.5, density 3.93)
- Website: webmineral.com/data/aurichalcite.shtml (density 3.64-3.9, hardness 2)
- Wikipedia: http://en.wikipedia.org/wiki/Aurichalcite (Accessed Sept 2, 2005; density = 3.96, hardness = 1-2)