Terbium compounds

<p>Terbium compounds are <a href="/facts/Chemical_compound/37FXqqtv">compounds</a> formed by the <a href="/facts/Lanthanide/rt3XIRCl">lanthanide</a> metal <a href="/facts/Terbium/ICF3PMED">terbium</a> (Tb). Terbium generally exhibits the +3 <a href="/facts/Oxidation_state/W53W6s6V">oxidation state</a> in these compounds, such as in <a href="/facts/Terbium(III)_chloride/bfu1DYKy">TbCl3</a>, <a href="/facts/Terbium(III)_nitrate/kWWpJec5">Tb(NO3)3</a> and Tb(CH3COO)3. Compounds with terbium in the +4 oxidation state are also known, such as <a href="/facts/Terbium(IV)_oxide/0sDrB3ts">TbO2</a> and BaTbF6. Terbium can also form compounds in the 0, +1 and +2 oxidation states.
</p><p>The trivalent terbium ion (Tb3+) is generally colorless in aqueous solution, and when it is irradiated by certain wavelengths of ultraviolet light (such as 254 nm or 365 nm) in solution or crystal form, it will emit green fluorescence. This property has given rise to applications in fields such as <a href="/facts/Optics/p0vq4S1T">optics</a>. The tetravalent terbium ion (Tb4+) is non-luminescent and its coexistence with Tb3+ will reduce the green emission of Tb3+.
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Terbium compounds open-in-new

Terbium compounds