Terbium(Tb) is the one of the lanthanide element with an atomic number 63. Terbium is a silvery white earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is an electropositive metal that reacts with water producing hydrogen gas. Terbium is never found as pure element in nature. However, terbium is found as component of many minerals like cerite, gadolinite, monazite, xenotime nad euxenite. Terbium was discovered by Swedish chemist Carl Gustaf Mosander as a separate elemental compound in 1843. Terbium was named after the village of Ytterby in Sweden as yttrium metal. Terbium was not purified until ion exchange technique was found. Most of terbium supply is used in green phosphorous. Nowadays, the richest commercial sources of terbium are the ion-adsorption clays of southern China. Only small amounts of terbium occur in bastnasite and monazite. Due to terbium’s rareness and its expensive prices, it has few commercial uses. Applications of Terbium...
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