Photo Caption: Periodic Table of the Elements (Mendeleev's Table). Chemically, the rare-earth elements (REE's), also known as the Lanthanoids (or Lanthanides), are only those that are shown along the upper of the two rows at the bottom of the table. They range in atomic number from 51 (La, lanthanum) to 71 (Lu, lutetium). All occur in nature except promethium (Pm), which is manmade.
The light REE's comprise lanthanum through europium (Eu). The heavy REE's comprise gadolinium (Gd) through lutetium. Yttrium (Y) and scandium (Sc) products are often sold by suppliers of REE's because their properties are similar, hence, they are commercially included with the REE's. In nature, yttrium generally occurs with the heavy REE's and is used in exploration as an indicator element in the search for "heavies" deposits. | Quick Report allows you to generate a custom report on our company. To do so, first click in the check boxes beside the items you want in your custom report. Then click the "Standard" or "Printable" button on the bottom of this page. A report will be produced and displayed.
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