THE RARE-EARTH ELEMENTS (REES) Rare earth elements (REE) are | Geology of the world and the Environment

THE RARE-EARTH ELEMENTS (REES)

Rare earth elements (REE) are a group of 17 chemically similar #metallic elements in the #periodic_table, The group consists of #yttrium , #scandium and the 15 lanthanide elements ( #lanthanum , #cerium , #praseodymium , #neodymium , #promethium , #samarium , #europium , #gadolinium , #terbium , #dysprosium , #holmium , #erbium , #thulium , #ytterbium , and #lutetium ). Scandium is found in most rare earth element deposits and is sometimes classified as a rare earth element. The International Union of Pure and Applied #Chemistry includes scandium in their rare earth element definition.

The rare earth elements are all #metals, and the group is often referred to as the "rare earth metals." These metals have many similar properties, and that often causes them to be found together in #geologic deposits. They are also referred to as "rare earth oxides" because many of them are typically sold as #oxide compounds.

Despite their name, REE are not rare. In fact, they're rather plentiful in the Earth's crust. But, tremendous effort and investment are required to extract, refine and process them.

Picture http://unet.conocimientos.com.ve/temas-de-tecnologia

#GeologyHere #Note
https://www.instagram.com/p/COpp5fihg_o/?igshid=16vivz9qzzf55