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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

Feb 19, 2016 ... Pure iridium probably does not occur in nature; its abundance in the Earth's crust is very low, about 0.001 parts per million. ... Iridium-containing ores are found in South Africa and Alaska, U.S., as well as in Myanmar (Burma), ...

Iridium - Chemicool

www.chemicool.com/elements/iridium.html

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, ...

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 ...

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 ...

Facts About Iridium - Live Science

www.livescience.com/39143-iridium.html

Aug 23, 2013 ... Properties, sources and uses of the element iridium. ... Stunning Cloud Maps Tell the Story of Life on Earth · Polar bears decimating seabird ...

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 ...

Chemical Elements.com - Iridium (Ir)

www.chemicalelements.com/elements/ir.html

Rare Earth Elements. Iridium at Chemical Elements.com. Basic Information | Atomic Structure | Isotopes ... [Bohr Model of Iridium], Number of Energy Levels: 6 .

Iridium»the essentials [WebElements Periodic Table]

www.webelements.com/iridium/

Iridium is found as the free element alloyed with platinum and other platinum ... 0.05, Chemical elements abundance by weight in the earth's crust on a miniature  ...

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

www.chemistryexplained.com

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 - 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.