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Terbium is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. [9] It is relatively stable in air compared to the more reactive lanthanides in the first half of the lanthanide series. [10] Terbium exists in two crystal allotropes with a transformation temperature of 1289 °C between them. [9]
Isotopes of terbium (65Tb) Naturally occurring terbium (65 Tb) is composed of one stable isotope, 159 Tb. Thirty-seven radioisotopes have been characterized, with the most stable being 158 Tb with a half-life of 180 years, 157 Tb with a half-life of 71 years, and 160 Tb with a half-life of 72.3 days. All of the remaining radioactive isotopes ...
Terbium compounds are compounds formed by the lanthanide metal terbium (Tb). Terbium generally exhibits the +3 oxidation state in these compounds, such as in TbCl 3, Tb (NO 3) 3 and Tb (CH 3 COO) 3. Compounds with terbium in the +4 oxidation state are also known, such as TbO 2 and BaTbF 6. [ 1 ] Terbium can also form compounds in the 0, [ 2 ...
Terbium (III,IV) oxide, occasionally called tetraterbium heptaoxide, has the formula Tb 4 O 7, though some texts refer to it as TbO 1.75. There is some debate as to whether it is a discrete compound, or simply one phase in an interstitial oxide system. Tb 4 O 7 is one of the main commercial terbium compounds, and the only such product ...
Terbium (IV) oxide. [O-2]. [O-2]. [Tb+4] Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Terbium (IV) oxide is an inorganic compound with a chemical formula TbO 2. It can be produced by oxidizing terbium (III) oxide by oxygen gas at 1000 atm and 300 °C. [ 2 ]
Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb 2 O 3. It is a p-type semiconductor, which conducts protons, which is enhanced when doped with calcium. [3] It may be prepared by the reduction of Tb 4 O 7 in hydrogen at 1300 °C for 24 hours. [4] Tb 4 O 7 + H 2 ...
Terbium (III) acetate reacts with caesium carbonate to form a precipitation of terbium hydroxycarbonate, which reacts with excess caesium carbonate and dissolves again. The reaction was irradiated with ultraviolet light with a wavelength of 365 nm, which has the characteristic green light of terbium. The tetrahydrate of terbium acetate can lose ...
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