Difference between revisions of "Pseudomalachite"
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[[[SliderGallery rightalign|pseudomalachiteRS.jpg~Raman|Pseudomalachite (HU Mineral Museum).PNG~FTIR]]] | [[[SliderGallery rightalign|pseudomalachiteRS.jpg~Raman|Pseudomalachite (HU Mineral Museum).PNG~FTIR]]] | ||
| − | == | + | == Physical and Chemical Properties == |
| − | Crystals = massive Fracture = conchoidal | + | * Crystals = massive |
| − | + | * Fracture = conchoidal | |
| − | Unlike malachite, pseudomalachite will not react with acids. | + | * Cleavage = imperfect |
| + | * Luster = glassy | ||
| + | * Streak = bluish green | ||
| + | * Unlike malachite, pseudomalachite will not react with acids. | ||
{| class="wikitable" | {| class="wikitable" | ||
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! scope="row"| Density | ! scope="row"| Density | ||
| − | | 3.6-4.34 | + | | 3.6-4.34 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | + | * MinDat: [http://mineral.galleries.com/minerals/phosphat/pseudoma/pseudoma.htm Pseudomalachite] | |
| − | * | + | * Naumova et al. Studies in Conservation 35:81-88, 1990 |
| − | |||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 14:09, 22 October 2022
Description
Dark waxy green crystals composed of basic copper phosphate. Pseudomalachite occurs naturally in the oxidation zones for copper ores. It resembles Malachite in appearance but lacks the characeristic light/dark banding of malachite. Pseudomalachite has been found in Zaire (Shaba), Slovakia (Libethen), Germany (Bavaria), France, Russia, Canada and the U.S. (Arizona).
Synonyms and Related Terms
basic copper phosphate; false malachite; ehlite; lunnite; Pseudomalachit (Deut.)
.PNG)
Physical and Chemical Properties
- Crystals = massive
- Fracture = conchoidal
- Cleavage = imperfect
- Luster = glassy
- Streak = bluish green
- Unlike malachite, pseudomalachite will not react with acids.
| Composition | Cu5(PO4)2(OH)4 |
|---|---|
| Mohs Hardness | 4.0-4.5 |
| Density | 3.6-4.34 g/ml |
| Molecular Weight | 542.68 |
| Refractive Index | 1.791; 1.856; 1.867 |
Resources and Citations
- MinDat: Pseudomalachite
- Naumova et al. Studies in Conservation 35:81-88, 1990