31. The carbonatite has important resources of rare earth elements and is currently managed by ASX-listed Peak Resources. 32. It also provides a source of unusual mineral specimens and rare earth elements ( REE ) extraction. 33. Additionally carbonatites may be either enriched in magnetite and apatite or rare earth elements , fluorine and barium. 34. The magnetic medium are typically amorphous R-FeCo thin film ( R being a rare earth element ). 35. Bastn�site and the phosphate mineral monazite are the two largest sources of cerium and other rare earth elements . 36. In trace elements, they are typically more enriched in the light rare earth elements than mid-ocean ridge basalts. 37. Rare earth elements are popular dopants.38. Rare earth elements are strongly enriched.39. Regarding rare earth elements , most reserves are located in China, which controls the world market for these elements. 40. And one of my favorite books is called " Episodes From the History of the Rare Earth Elements ."
