Difference between revisions of "Connellite"
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| + | [[File:Connellite-54486 (1).jpg|thumb|Connellite<br>Image credit: Rob Lavinsky]] | ||
== Description == | == Description == | ||
| + | [[File:Connellite Raman RRUFF R060503.png|thumb|Raman spectrum of Connellite, Credit: [https://rruff.info/connellite/display=default/R060503 RRUFF]]] | ||
| + | A rare blue green copper corrosion product that forms delicate acicular crystals. Connellite was found as a mineral in Cornwall in 1802 by Philip Rashleigh and was examined chemically by Arthur Connell in 1847. It has also been found on prehistoric bronzes. | ||
| − | + | ==Physical and Chemical Properties== | |
| − | == | + | * Composition = Cu<sub>19</sub>Cl<sub>4</sub>SO<sub>4</sub>)(OH)<sub>32</sub> 3H2O |
| − | + | * Blue green to light blue fibrous to acicular needles | |
| − | + | * Lust = vitreous to glass | |
| − | + | * Streak = light blue green | |
| − | + | * Hardness = 3 | |
| − | + | * Density = 3.4 | |
==Resources and Citations== | ==Resources and Citations== | ||
| Line 16: | Line 19: | ||
* Walter A. Franke, Magda Mircea, "Plutarch's Report on the Blue Patina of Bronze Statues at Delphi: A Scientific Explanation" JAIC 44(2):103, 2005. | * Walter A. Franke, Magda Mircea, "Plutarch's Report on the Blue Patina of Bronze Statues at Delphi: A Scientific Explanation" JAIC 44(2):103, 2005. | ||
| − | * Wikipedia: http://en.wikipedia.org/wiki/Connellite ( | + | * Wikipedia: http://en.wikipedia.org/wiki/Connellite (accessed Nov. 30, 2005) |
| + | * Webmineral: [http://webmineral.com/data/Connellite.shtml#.Y5DyJyjMI3o Connellite] | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 14:17, 7 December 2022
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Description
Raman spectrum of Connellite, Credit: RRUFF
A rare blue green copper corrosion product that forms delicate acicular crystals. Connellite was found as a mineral in Cornwall in 1802 by Philip Rashleigh and was examined chemically by Arthur Connell in 1847. It has also been found on prehistoric bronzes.
Physical and Chemical Properties
- Composition = Cu19Cl4SO4)(OH)32 3H2O
- Blue green to light blue fibrous to acicular needles
- Lust = vitreous to glass
- Streak = light blue green
- Hardness = 3
- Density = 3.4
Resources and Citations
- H. Otto 'Das Vorkommen von Conellit in Patinaschichten", Die Naturwissenschaften 50(1):16-17, 1963.
- Walter A. Franke, Magda Mircea, "Plutarch's Report on the Blue Patina of Bronze Statues at Delphi: A Scientific Explanation" JAIC 44(2):103, 2005.
- Wikipedia: http://en.wikipedia.org/wiki/Connellite (accessed Nov. 30, 2005)
- Webmineral: Connellite