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chemical similarity Reference Libraries

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Rare Earth Ore
2005-05-25 18:46:47

A rare earth is an oxide of a rare earth element. Often rare earth elements themselves are loosely called "rare earths". As to exactly what is a "rare earth" element is a matter of some ambiguity. The narrowest definition restricts it to the lanthanides, which are lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium,...

Word of the Day
orbity
  • A bereavement by loss of parents or children; the state of being orbate; orbation.
The word 'orbity' ultimately comes from a Latin word meaning 'bereaved'.