Difference between revisions of "Paratacamite"
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| − | [[File:Paratacamite-231241.jpg|thumb| Paratacamite from Levant mine, England; Wikipedia[https://commons.wikimedia.org/wiki/File:Paratacamite-231241.jpg]] | + | [[File:Paratacamite-231241.jpg|thumb| Paratacamite from Levant mine, England; Wikipedia[https://commons.wikimedia.org/wiki/File:Paratacamite-231241.jpg]]] |
== Description == | == Description == | ||
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==Physical and Chemical Properties== | ==Physical and Chemical Properties== | ||
* Composition = Cu(OH)<sub>2</sub>-CuCl | * Composition = Cu(OH)<sub>2</sub>-CuCl | ||
| − | * Description = | + | * Description = Dark green, massive or rhombohedral crystals |
* Fracture = Conchoidal | * Fracture = Conchoidal | ||
| + | * Luster = Vitreous to dull | ||
| + | * Streak = light green | ||
* Hardness = 3 | * Hardness = 3 | ||
* Density = 3.74 g/cm3 | * Density = 3.74 g/cm3 | ||
Latest revision as of 12:46, 9 December 2022
Paratacamite from Levant mine, England; Wikipedia[1]
Description
A light green, chlorinated copper corrosion product. Paratacamite is a basic copper chloride. It has been found as a green pigment in 5th - 8th century Asian wall paintings, as well as in some later Persian miniature and European paintings. On Copper and Bronze artifacts, paratacamite and Atacamite indicate the presence of Bronze disease.
Synonyms and Related Terms
basic copper chloride; Paratacamit (Deut.); para atacamiet (Ned.);
Physical and Chemical Properties
- Composition = Cu(OH)2-CuCl
- Description = Dark green, massive or rhombohedral crystals
- Fracture = Conchoidal
- Luster = Vitreous to dull
- Streak = light green
- Hardness = 3
- Density = 3.74 g/cm3
Resources and Citations
- Webmineral: Paratacamite
- Wikipedia: Paratacamite
- The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: 'Pigment'