Terbia

Terbium(III) oxide

Terbium(III) oxide

Chemical compound

Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb
2O
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
4O
7 in hydrogen at 1300 °C for 24 hours.[4]

Tb4O7 + H2 → 2 Tb2O3 + H2O
Quick Facts Names, Identifiers ...

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.[5]

References

  1. [1]
    Curzon A.E.; Chlebek H.G. (1973). "The observation of face centred cubic Gd, Tb, Dy, Ho, Er and Tm in the form of thin films and their oxidation". J. Phys. F. 3 (1): 1–5. Bibcode:1973JPhF....3....1C. doi:10.1088/0305-4608/3/1/009.
  2. [2]
    R. Robie, B. Hemingway, and J. Fisher, "Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures," US Geol. Surv., vol. 1452, 1978.
  3. [3]
    Reidar Haugsrud; Yngve Larring & Truls Norby (December 2005). "Proton conductivity of Ca-doped Tb
    2    O
    3    ". Solid State Ionics. 176 (39–40). Elsevier B.V.: 2957–2961. doi:10.1016/j.ssi.2005.09.030.
  4. [4]
    G. J. McCarthy (October 1971). "Crystal data on C-type terbium sesquioxide (Tb
    2    O
    3    )". Journal of Applied Crystallography. 4 (5): 399–400. doi:10.1107/S0021889871007295.
  5. [5]
    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, 1961, 83, 10, S. 2219-23.


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