Rare earths - what they do
The Russian chemist Dmitri Mendeleev had predicted the element's existence in 1869 - his new Periodic Table had a specific place for ... lanthanum is the second most abundant rare earth. It's heavily used in petroleum cracking: In the refining of crude ...
What is an LED?
LEDs are comprised of compound semiconductor materials, which are made up of elements from group III and group V of the periodic table (these are known as III-V materials). Examples of III-V materials commonly used to make LEDs are gallium arsenide (GaAs ...
Rare Earths: They're Neither Rare nor Earths. But They Could Save the Planet.
If the periodic table was actually a roulette table and people could bet on the element they thought would be the ... and europium makes energy-efficient LED bulbs. Many superconductors use yttrium, and even simple wind turbines need dysprosium and terbium ...
The metal burns with a bright light and for this reason was also used in photographic flash bulbs ... the magnesium in all these products can be recycled at very little cost. Chemistry in its element: an interactive tour of the periodic table.
Minor Metals I: The Rare Earth Metals Considered Together
The rare earth elements were defined by Mr. Herring as a collection of 16 chemical elements in the periodic table; namely 14 of the 15 following ... Indeed, probably, the most common use of rare earth metals up until the end of World War II was for ...