Terbium(III) oxide
From Wikipedia, the free encyclopedia
| Terbium(III) oxide | ||
|---|---|---|
 | ||
| IUPAC name terbium(III) oxide | ||
| Other names terbium trioxide, terbia, terbium sesquioxide | ||
| Identifiers | ||
| CAS number | 12036-41-8  | |
| PubChem | 159410 | |
| EC number | 234-849-5 | |
| Jmol-3D images | {{#if:[O-2].[O-2].[O-2].[Tb+3].[Tb+3]|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 | |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
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 when doped with calcium,[2] and may be prepared by the reduction of Tb
4O
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
- ↑ 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.
- ↑ Reidar Haugsrud, Yngve Larring, and Truls Norby (December 2005). "Proton conductivity of Ca-doped Tb
2O
3". Solid State Ionics (Elsevier B.V.) 176 (39–40): 2957–2961. doi:10.1016/j.ssi.2005.09.030. - ↑ G. J. McCarthy (October 1971). "Crystal data on C-type terbium sesquioxide (Tb
2O
3)". Journal of Applied Crystallography 4 (5): 399–400. doi:10.1107/S0021889871007295. - ↑ 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.
- ↑ 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.
| |||||
This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.