11. Terbium ( III ) chloride frequently forms a hexahydrate.12. Swedish chemist Carl Gustaf Mosander discovered terbium as a separate elemental compound in 1843. 13. Terbium was not isolated in pure form until the advent of ion exchange techniques.14. Terbium oxide is used in green phosphors in fluorescent lamps and color TV tubes.15. However they were unable to make the cerium, praseodymium, and terbium nickelates. 16. Terbium easily oxidizes, and is therefore used in its elemental form specifically for research.17. Terbium -CRTs, though its drawback is marked lowering of efficiency at higher temperatures.18. Dysprosium is one of the components of Terfenol-D, along with iron and terbium . 19. This permitted the discovery of four new elements : Yttrium, Terbium , Erbium and Ytterbium. 20. The yttrofluorite variety of the mineral fluorite owes its creamy-yellow fluorescence in part to terbium .
