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yttrium

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yttrium

Silver-grey, metallic element, atomic number 39, relative atomic mass 88.905. It is associated with and resembles the rare-earth elements (lanthanides), occurring in gadolinite, xenotime, and other minerals. It is used in colour-television tubes and to reduce steel corrosion.

The name derives from the Swedish town of Ytterby, near where it was first discovered in 1788. Swedish chemist Carl Mosander (1797–1858) isolated the element in 1843.
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China supplies at least 95 per cent of the world's rare earths - 17 chemical elements with hard-to-pronounce names such as praseo-dymium and yttrium - essential for a wide range of high-tech devices and green technologies.
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The experiments showed that yttrium in trace amounts - less than 1 microgram per milliliter of water - may disrupt normal calcium signalling in neurons and other electrically active cells, an amount far lower than what had been thought to be safe levels.
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“More significantly for Ucore, Beijing has stipulated that the heavy rare earths (HREE's) dysprosium, terbium, thulium, lutetium and yttrium will not just be cut back, but will be fully prohibited from export under the new REE Plan,” says the company.
Ucore Uranium (UCU) climbs on China rare earths news by Buzz on the Boards / Stockhouse
 
 
 
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