Similarly, an iridium anomaly in core samples from the Pacific Ocean suggested the Eltanin impact of about 2.5 million years ago. For this reason, the unusually high abundance of iridium in the clay layer at the Cretaceous–Paleogene boundary gave rise to the Alvarez hypothesis that the impact of a massive extraterrestrial object caused the extinction of dinosaurs and many other species 66 million years ago, now known to be produced by the impact that formed the Chicxulub crater.
Iridium is found in meteorites in much higher abundance than in the Earth's crust. Iridium radioisotopes are used in some radioisotope thermoelectric generators. Iridium metal is employed when high corrosion resistance at high temperatures is needed, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process.
The most important iridium compounds in use are the salts and acids it forms with chlorine, though iridium also forms a number of organometallic compounds used in industrial catalysis, and in research. 191Ir and 193Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes the latter is the more abundant. Iridium is one of the rarest elements in Earth's crust, with annual production and consumption of only 3 tonnes (6.6 thousand pounds). Smithson Tennant, the primary discoverer, named it after the Greek goddess Iris, personification of the rainbow, because of the striking and diverse colors of its salts. Iridium was discovered in 1803 among insoluble impurities in natural platinum. However, corrosion-resistance is not quantifiable in absolute terms although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable, whereas gold dust is not flammable but can be attacked by substances that iridium resists, such as aqua regia. It is one of the most corrosion-resistant metals, even at temperatures as high as 2,000 ☌ (3,630 ☏). A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm 3 (0.815 lb/cu in) as defined by experimental X-ray crystallography. The small scratch i fixed has transformed into a black squiggly line on my dark grey metallic paint job.Iridium is a chemical element with the symbol Ir and atomic number 77.
#IRIDIUM METALLIC CODE#
He assured me that was the right one for my paint code and told me to try it on an inconspicuous place and let it dry.
I took it back and told the guy it was too dark for my truck and that theres got to be a mistake in the computer somehow.
#IRIDIUM METALLIC TV#
I shook it for probably 5-10 minutes just walking around the house with it and watching tv and stuff so I'm pretty sure it was mixed enough. I used a piece of white paper and dabbed a drop on it to see what it was. I told the guy everybody I spoke with said Tungsten the entire time i looked at these things and only now am i being given a different name. I went to the dealer to order and was told my color was actually Iridium. So i bought my "Tungsten" grey metallic 2015 Silverado and like with every new vehicle i usually get a paint pen just because.