Difference between revisions of "Pseudomalachite"
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basic copper phosphate; false malachite; ehlite; lunnite; Pseudomalachit (Deut.) | basic copper phosphate; false malachite; ehlite; lunnite; Pseudomalachit (Deut.) | ||
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== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
Latest revision as of 12:32, 9 December 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