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Do you have a reference to the usage of iridium?
by bonzini 10y ago
Do you have a reference to the usage of iridium?
- milankragujevic 10y ago"Iridium is one of the nine least abundant stable elements in Earth's crust, having an average mass fraction of 0.001 ppm in crustal rock; gold is 40 times more abundant, platinum is 10 times more abundant, and silver and mercury are 80 times more abundant." - https://en.wikipedia.org/wiki/Iridium#cite_note-greenwood-5 https://en.wikipedia.org/wiki/Iridium#cite_note-greenwood-5
- ralfd 10y agoSilver is only double as abundant as Gold?
- brianwawok 10y agoBut 20x less demand dating back thousands of years. Weird huh?
- bluejekyll 10y agoThere was a great article I read about this question a few years ago, I couldn't find it though. Basically the question was why gold and not silver, platinum, etc., as the desireable metal for commerce/jewelry. The answer lies in golds uniqueish properties, it is rare (not the rarest), it is unique in color (platinum is hard to distinguish from other metals by sight), where gold is confused for other things or to determine its quality a simple bite test will determine its quality, without needing to melt it down (unlike silver colored metals), it's soft enough to be easily formed into jewelry.
- davezatch 10y agoNot an article, but here's a podcast that goes into that: http://www.npr.org/sections/money/2011/02/07/131363098/the-tuesday-podcast-why-gold http://www.npr.org/sections/money/2011/02/07/131363098/the-t...
- elevensies 10y ago(multiple estimates since they don't exactly line up squarely) ... [PDF] http://minerals.usgs.gov/minerals/pubs/commodity/platinum/myb1-2014-plati.pdf http://minerals.usgs.gov/minerals/pubs/commodity/platinum/my... On page 4, it says 2014 global consumption of Ir was 6100kg. (3rd last para). ... https://en.wikipedia.org/wiki/Iridium https://en.wikipedia.org/wiki/Iridium Wikipedia article para 2 says global consumption and production is three tonnes. ... http://www.bloomberg.com/news/articles/2014-02-19/iridium-climbs-to-3-month-high-amid-buying-after-annual-slump http://www.bloomberg.com/news/articles/2014-02-19/iridium-cl... This (2014) article estimates global production as 129,000 ounces to 322,000 ounces, which is about 3500 kg to 9000 kg.
- bonzini 10y agoSorry, I meant usage of iridium for this battery. The article only mentions cobalt.
- elevensies 10y agoOh, in that case, I don't see any mention of it either, or in the paper, http://li.mit.edu/Archive/Papers/16/Zhu16KushimaNatureEnergy.pdf http://li.mit.edu/Archive/Papers/16/Zhu16KushimaNatureEnergy...
- baku-fr 10y agoI know iridium is sometimes used in spark plugs. http://densoautoparts.com/iridium-power-spark-plug-configurations http://densoautoparts.com/iridium-power-spark-plug-configura...