Iridium
Definition of 'Iridium'One of the transition metals on the periodic table. Iridium appears as symbol Ir on the periodic table and has an atomic weight of 192.217 and a density of 22.56 g/cm³, making it the second densest known element. Because iridium is so expensive, it is typically used only in applications that require a very small amount of the element. High-grade automobile spark plugs, for example, have small iridium tips that last 100,000 miles - much longer than conventional spark plugs. The primary use for iridium is in alloys with its neighbor on the periodic table, platinum (symbol Pt, atomic number 78). |
|
Investopedia explains 'Iridium'Iridium is the most corrosion-resistant metal on Earth. It is extremely difficult to melt; because of its high melting point, it is hard to form, machine or work iridium. It is also one of the rarest elements in Earth's crust. The huge asteroid that is believed to have wiped out the dinosaurs 65 million years ago is also responsible for the thin layer of iridium-rich clay found around Earth. This layer of iridium forms the Cretaceous-Tertiary boundary (also known as the K-T Boundary because the Cretaceous is represented by the letter "K"). |
Related Definitions
Articles Of Interest
-
A Primer On Palladium
This rare metal is being used in the industry more and more. See how you can get exposure. -
A Beginner's Guide To Precious Metals
All that glitters isn't gold. Find out how to get started on your treasure hunt. -
Investing In The Metals Markets
Learn the many options available for investing in the earth's chemical elements, such as gold, silver and rare-earth metals. -
Understanding Rare Earth Metals
Rare earth metals are quickly becoming a sought-after global commodity. Find out what they are and how you can invest. -
Using Base Metals As An Economic Indicator
Base metals may not glitter like gold, but they can still guide an investor to a conclusion about overall economic health. -
Is The Gold Pain Over?
After falling more than 13%, gold has staged a rebound but is that for fundamental reasons or the work of value investors? Will gold reward investors who didn't give up or is there more pain ... -
Uncovering Oil And Gas Futures
Find out how to stay on top of data reports that could cause volatility in oil and gas markets. -
Halliburton Has Gotten Interesting Again
If oilfield activity has bottomed, Halliburton would be a good pick here. -
Schlumberger Looks Good At Today's Prices
Schlumberger remains the best of breed in the oil services sector, and the price is getting attractive. -
What Is Wrong With Gold?
Despite its historic and symbolic appeal, this metal is simply a commodity. Here we explore its meaning as an investment.
Free Annual Reports