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Terbium Oxide
Terbium oxide may refer to any of the following: *Terbium(III) oxide, Tb2O3 *Terbium(III,IV) oxide, Tb4O7 *Terbium(IV) oxide Terbium(IV) oxide is an inorganic compound with a chemical formula TbO2. It can be produced by oxidizing terbium(III) oxide by oxygen gas at 1000 atm and 300 °C. Decomposition Terbium(IV) oxide starts to decompose at 340 °C, prod ..., TbO2 {{Short pages monitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terbium(III) Oxide
Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula . It is a p-type semiconductor, which conducts protons, which is enhanced when doped with calcium. It may be prepared by the reduction of in hydrogen at 1300 °C for 24 hours. : It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed. : Tb2O3 + 6 H+ → 2 Tb3+ + 3 H2O The crystal structure is cubic and the lattice constant is ''a'' = 1057 pm.N. C. Baenzinger, H. A. Eick, H. S. Schuldt, L. Eyring: ''Terbium Oxides. III. X-Ray Diffraction Studies of Several Stable Phases''. In: ''Journal of the American Chemical Society The ''Journal of the American Chemical Society'' is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society. The journal has absorbed two other publications in its history, the ''Journal of Analytic ...'', 1961, 83, 10, S. 2219-23 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terbium(III,IV) Oxide
Terbium(III,IV) oxide, occasionally called tetraterbium heptaoxide, has the formula Tb4O7, though some texts refer to it as TbO1.75. There is some debate as to whether it is a discrete compound, or simply one phase in an interstitial oxide system. Tb4O7 is one of the main commercial terbium compounds, and the only such product containing at least some Tb(IV) (terbium in the +4 oxidation state), along with the more stable Tb(III). It is produced by heating the metal oxalate, and it is used in the preparation of other terbium compounds. Terbium forms three other major oxides: Tb2O3, TbO2, and Tb6O11. Synthesis Tb4O7 is most often produced by ignition of the oxalate at or the sulfate in air. The oxalate (at 1000 °C) is generally preferred, since the sulfate requires a higher temperature, and it produces an almost black product contaminated with Tb6O11 or other oxygen-rich oxides. Chemical properties Terbium(III,IV) oxide loses O2 when heated at high temperatures; at more moderate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |