Rare Earth Abbreviations

REE and other Rare Earth Element Abbreviations

Yttrium is classified as a RE, REE, REM and HREE.
Yttrium is classified as a RE, REE, REM and HREE. Tomihahndorf, Free Documentation License

There are many abbreviations associated with the rare earth elements. Rare earth abbreviations include REE, RE, REM, REO, LREE and HREE. Here is a list of what the rare earth abbreviations mean.

  • RE = rare earth (any of the rare earth elements or any of the ores containing rare earth elements)
  • REE = rare earth elements - usually (LREE, HREE, Y, Sc, [Th, U])​
  • REM = rare earth metals (synonym of rare earth)​
  • REO = rare earth oxides​
  • LREE = light rare earth elements ((La, Ce, Pr, Nd, Sm)
  • HREE = heavy rare earth elements (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu plus Y) or less commonly (Eu-Lu)