Is iridium a rare earth metal?
Iridium is one of the rarest metals in the Earth's crust, with an annual production of just 3 tons. Iridium is one of the rarest metals in the Earth's crust, with an annual production of just 3 tons.
Almost as dense as the densest metal, osmium, iridium is the most corrosion-resistant metallic element, resistant to air, water, salts and acids. Because of its hardness, iridium is difficult to manufacture into usable parts, but the same properties that make it difficult to work with also make it a valuable addition to strengthening alloys. Although it is also a catalytic metal, iridium is the material of choice for crucibles due to its high melting point and corrosion resistance. Like other platinum group metals, iridium is mined as a by-product of nickel, and like other platinum group metals, the largest deposits of iridium are located in South Africa and Russia. Given its rarity in the Earth's crust, it tends to make up only a small portion of a PGM miner's portfolio.文章源自平泽贵金属回收公司 www.51gjs.comPINGZE Precious Metals Recycling-https://en.51gjs.com/19209.html 文章源自平泽贵金属回收公司 www.51gjs.comPINGZE Precious Metals Recycling-https://en.51gjs.com/19209.html