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Iridium

en.wikipedia.org/wiki/Iridium

Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, ..... Within Earth's crust, iridium is found at highest concentrations in three types of geologic structu...

iridium (Ir) | chemical element | Britannica.com

www.britannica.com/science/iridium

Pure iridium probably does not occur in nature; its abundance in the Earth's ... Iridium-containing ores are found in South Africa and Alaska, U.S., as well as in ...

Iridium, Chemical Element - reaction, water, uses, elements ...

www.chemistryexplained.com/elements/C-K/Iridium.html

In fact, iridium is the most corrosion-resistant metal known. ... In some parts of the Earth, they have found a layer of the Earth's crust that contains an unusually ...

Iridium - New World Encyclopedia

www.newworldencyclopedia.org/entry/Iridium

Apr 22, 2014 ... Iridium (chemical symbol Ir, atomic number 77) is a dense, hard, brittle, silvery- white ... Iridium is rare in the Earth's crust, but it is found at higher ...

World's Rarest Metals (Or, what's $1 billion per troy ounce?)

www.curiousnotions.com/home/metals.asp

Recent prices of iridium, rhodium, & palladium. ... by weight in the earth's crust, of what many would recognize to be the seven most precious or “noble” metals.

Facts About Iridium - Live Science

www.livescience.com/39143-iridium.html

Aug 23, 2013 ... Properties, sources and uses of the element iridium. ... Live Science · Planet Earth ... Stolen Radioactive Material Found in Iraq; Real Heavy Metal: Fans Want Motörhead Singer on Periodic Table; Infographic: the chemical ...

Pictures, stories, and facts about the element Iridium in the Periodic ...

periodictable.com/Elements/077/

The K-T boundary clay is is found in thin layers all over the world at ... It's as if something dumped a huge quantity of iridium on the earth and spread it around in ...

Where does iridium come from? | Reference.com

www.reference.com/science/iridium-come-9a22503205cd54f0

Found on Earth in neon signs and lighting, between planets, between stars, in stars and in every galaxy system, 99 percent of the universe is plasma. According  ...

Iridium - Elements Database

www.elementsdatabase.com/Iridium-Ir-77-element/

This element is among the rarest found in the earth's crust, and the total production and consumption per year is about 3 tonnes. The only isotopes of iridium, ...

Why Is Iridium Much More Common In Asteroids Than In The Earth's ...

www.thenakedscientists.com/forum/index.php?topic=14388.0

Iridium is one of the rarest non-radioactive, non-noble gas elements in the Earth's crust, but it is relatively common in meteorites. Iridium and ...

More Info

Iridium - Chemicool

www.chemicool.com

Abnormally high amounts of iridium have been found in rocks dating to the K-T ... a widely held view that an iridium-containing comet struck the Earth at that time, ...

It's Elemental - The Element Iridium

education.jlab.org

Since meteors and asteroids contain a higher percentage of iridium than the earth's crust, this iridium enriched layer is seen as evidence that the earth was ...

Iridium - Element information, properties and uses | Periodic Table

www.rsc.org

Element Iridium (Ir), Group 9, Atomic Number 77, d-block, Mass 192.217. Sources , facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.