Terbium(III) oxide

Terbium(III) oxide
IUPAC name

terbium(III) oxide
Other names

terbium trioxide, terbia, terbium sesquioxide
Identifiers
CAS number 12036-41-8 Y
PubChem 159410
EC number 234-849-5
Properties
Molecular formula O3Tb2
Molar mass 365.85 g mol−1
Appearance white crystals
Density 7.9 g cm−3
Melting point

2410 °C, 2683 K, 4370 °F
Structure
Crystal structure Cubic, cI80
Space group Ia-3, No. 206[1]
Hazards
EU classification not listed
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb2O3. It is a p-type semiconductor when doped with calcium,[2] and may be prepared by the reduction of Tb4O7 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

  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 Tb2O3". 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 (Tb2O3)". 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.