Terbium(III) oxide

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Terbium(III) oxide
Tl2O3structure.jpg
Identifiers
CAS number 12036-41-8 YesY
PubChem 159410
EC number 234-849-5
Jmol-3D images Image 1
Properties
Molecular formula O3Tb2
Molar mass 365.85 g mol−1
Appearance white crystals
Density 7.91 g/cm3
Melting point 2,410 °C (4,370 °F; 2,680 K)
Magnetic susceptibility 0.07834 cm3/mol
Structure
Crystal structure Cubic, cI80
Space group Ia-3, No. 206[1]
Hazards
EU classification not listed
Related compounds
Other anions Terbium(III) chloride
Other cations Gadolinium(III) oxide
Dysprosium(III) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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 when doped with calcium,[2] and may be prepared by the reduction of Tb
4
O
7
in hydrogen at 1300 °C for 24 hours.[3]

It is a p-type semiconductor.[4]

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[edit]

  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. doi:10.1088/0305-4608/3/1/009. 
  2. ^ Reidar Haugsrud, Yngve Larring, and Truls Norby (December 2005). "Proton conductivity of Ca-doped Tb
    2
    O
    3
    ". Solid State Ionics (Elsevier B.V.) 176 (39–40): 2957–2961. doi:10.1016/j.ssi.2005.09.030.
     
  3. ^ 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.
     
  4. ^ Reidar Haugsrud, Yngve Larring, and Truls Norby (December 2005). "Proton conductivity of Ca-doped Tb2O3". Solid State Ionics (Elsevier B.V.) 176 (39-40): 2957–2961. doi:10.1016/j.ssi.2005.09.030. 
  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.