Rare earth elements (ree) are becoming increasingly important in electronic devices used in the defense, alternative energy, and communications industries. Minable deposits of rees are … The rare-earth elements (ree), also called rare-earth metals, or rare earths, are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. The 15 lanthanides (or lanthanoids), … Ree-bearing mineral deposits are relatively rich in either light rare earth elements (lrees) or heavy rare earth elements (hrees), with lrees generally more abundant.
