Difference between revisions of "Pseudomalachite"
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== Description == | == Description == | ||
| − | Dark waxy green crystals composed of basic copper phosphate. Pseudomalachite occurs naturally in the oxidation zones for copper ores. It resembles [[ | + | 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 == | == Synonyms and Related Terms == | ||
basic copper phosphate; false malachite; ehlite; lunnite; Pseudomalachit (Deut.) | basic copper phosphate; false malachite; ehlite; lunnite; Pseudomalachit (Deut.) | ||
| + | [[[SliderGallery rightalign|Pseudomalachite (HU Mineral Museum).PNG~FTIR (MFA)|Pseudomalachite IR-ATR RRUFF R040175.png~IR-ATR (RRUFF)|Pseudomalachite Raman RRUFF R040175.png~Raman (RRUFF)]]] | ||
| + | == Physical and Chemical Properties == | ||
| − | + | * Crystals = massive | |
| − | + | * Fracture = conchoidal | |
| − | + | * Cleavage = imperfect | |
| − | + | * Luster = glassy | |
| − | Crystals = massive Fracture = conchoidal | + | * Streak = bluish green |
| − | + | * Unlike malachite, pseudomalachite will not react with acids. | |
| − | 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 | ||
| Line 34: | Line 35: | ||
|} | |} | ||
| − | == | + | ==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]] | ||
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