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Rare-earth element - Wikipedia
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
15 Rarest Metals in the World
2024年3月15日 · Gold is one of the rarest and most valuable metals known to humanity, with an atomic number of 79. It is typically found in quartz veins and alluvial deposits. Gold has a distinctive yellow color and is highly malleable and ductile, making it valuable in jewelry, currency, and electronics.
How rare earth elements make modern technology possible
2023年1月16日 · In real life here on Earth, a group of natural metals known as the rare earths has made possible our own technology-powered society. Demand for these crucial components in nearly all modern...
Rare Earth Elements (Metals) - List - ThoughtCo
2019年5月2日 · Despite their name, the rare earths aren't actually rare with respect to abundance in the Earth's crust. The exception is promethium, a radioactive metal. The CRC Handbook of Chemistry and Physics and IUPAC list the rare earths as consisting of the lanthanides, plus scandium and yttrium.
A Look at Rare Earth Metals and Their Applications - ThoughtCo
2019年12月4日 · Rare earth metals are actually not as rare as their name might imply. They are critical to high-performance optics and lasers, and essential to the most powerful magnets and superconductors in the world.
Why are rare earth elements so rare? | Live Science
2023年10月1日 · The rare earth metals naturally have three positive charges and form incredibly strong ionic bonds with phosphate counterions, each possessing three negative charges.