Images of Terbium
65 Tb Terbium
Lanthanoid, mass: 158,92 u, 1 stable isotope (159), abundance rank (earth/space): 58/78
Pure terbium, 3 grams. Original size: 1 cm
Terbium is a relatively resistant, sparsely toxic lanthanoid. It has some special technical applications, especially in optoelectronics. Terbium(III)-ions can fluoresce very well in green and yellow, so terbium is used in in CRT television sets, similar to europium.
Terbium(III) sulfate, Tb2(SO4)3, a white salt (right), fluoresces green under ultraviolet light (left).
(Source: Images of Chemical Elements—A Virtual Museum)