Facts about Terbium
Terbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in Yttrium-oxide, Y2O3, and named after the village Ytterby in Sweden.
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Terbium is an inner transition metal (or lanthanide) that lies in period six of the periodic table, between gadolinium and dysprosium.
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Terbium (chemical symbol Tb, atomic number 65) is a silvery-white rare earth metal.
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Naturally occurring terbium is composed of one stable isotope, 159-Tb.
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Terbium is never found in nature as the free element, but it is contained in many minerals.
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